{"id":1128,"date":"2019-10-08T13:39:38","date_gmt":"2019-10-08T13:39:38","guid":{"rendered":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/?page_id=1128"},"modified":"2019-10-17T14:37:06","modified_gmt":"2019-10-17T14:37:06","slug":"woa-mirrors","status":"publish","type":"page","link":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/","title":{"rendered":"woa-mirrors"},"content":{"rendered":"

[et_pb_section fb_built=”1″ custom_padding_last_edited=”off|desktop” admin_label=”Header” _builder_version=”3.24″ background_color_gradient_direction=”188deg” background_image=”https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/art-gallery-55.jpg” background_size=”initial” background_repeat=”repeat” width=”100%” custom_padding_tablet=”5vw||5vw||true” fb_built=”1″ _i=”0″ _address=”0″][et_pb_row custom_padding_last_edited=”off|phone” _builder_version=”3.25″ background_position=”bottom_center” custom_padding_tablet=”17vw||17vw||false” use_custom_width=”on” width_unit=”off” custom_width_percent=”100%” locked=”off” _i=”0″ _address=”0.0″][et_pb_column type=”4_4″ _builder_version=”3.25″ custom_padding=”|||” _i=”0″ _address=”0.0.0″ custom_padding__hover=”|||”][et_pb_text _builder_version=”3.29.3″ text_font=”||||||||” header_font=”||||||||” header_2_font=”Verdana|500|||||||” header_2_text_align=”left” header_2_font_size=”56px” header_2_line_height=”1.3em” transform_translate_linked=”off” max_width=”100%” max_width_tablet=”70%” max_width_last_edited=”off|phone” header_2_font_size_tablet=”40px” header_2_font_size_phone=”26px” header_2_font_size_last_edited=”on|desktop” _i=”0″ _address=”0.0.0.0″]<\/p>\n

Works<\/h2>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_6,1_6,1_6,1_6,1_6,1_6″ _builder_version=”3.29.3″ _i=”1″ _address=”0.1″][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”0″ _address=”0.1.0″][et_pb_image src=”https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/eng_flag.jpg” url=”#en_mirrors” align=”center” _builder_version=”3.29.3″ width=”35%” width_tablet=”25%” width_phone=”15%” width_last_edited=”on|desktop” module_alignment=”center” _i=”0″ _address=”0.1.0.0″][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”1″ _address=”0.1.1″][et_pb_image src=”https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/italian_flag-1-150×150.png” url=”#it_mirrors” align=”center” _builder_version=”3.29.3″ width=”35%” width_tablet=”25%” width_phone=”15%” width_last_edited=”on|phone” _i=”0″ _address=”0.1.1.0″][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”2″ _address=”0.1.2″][\/et_pb_column][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”3″ _address=”0.1.3″][\/et_pb_column][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”4″ _address=”0.1.4″][\/et_pb_column][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”5″ _address=”0.1.5″][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”3_4,1_4″ _builder_version=”3.25″ _i=”2″ _address=”0.2″][et_pb_column type=”3_4″ _builder_version=”3.25″ custom_padding=”|||” _i=”0″ _address=”0.2.0″ custom_padding__hover=”|||”][et_pb_text module_id=”en_mirrors” _builder_version=”3.29.3″ hover_enabled=”0″ _i=”0″ _address=”0.2.0.0″]<\/p>\n

Virgo Mirrors<\/strong><\/span><\/h2>\n

In order to construct a three or four kilometre interferometer we needed large mirrors and very pure materials, with industrial processes of a level that might have seemed like science fiction, at the time … But three points are particularly important: the effective length of the arms, laser stability and mirrors.<\/p>\n

One of Virgo’s most daring challenges was, in fact, the manufacture of mirrors … It was a continuous tension towards absolute purity, a struggle against the smallest imperfection. To begin with, the mirrors we use are not metallic, like those we have at home or those that are adopted in astronomy for telescopes, but are made up of pure quartz crystals, profiled with very high precision and coated with a thin layer called coating<\/em>.<\/p>\n

Following this treatment, a mirror of this type is perfectly (or almost) reflective on one side and transparent on the other. Creating high-level coatings is, at the same time, a very sophisticated science as well as an art. A group led by the French physicist Jean-Marie Mackowski, an affable person and of great rectitude, a true gentleman took care for it, for our collaboration. In Lyon he had organized a laboratory called LMA, Laboratoire des Mat\u00e9riaux Avanc\u00e9s<\/em>, in which there were large machines capable of vacuum-depositing layers of tantalum pentoxide and quartz alternately – this was the structure of the coating – by means of a technique called sputtering. It is not important to know the details, suffice it to say that they were the best coatings in the world. The LIGO mirror coating was also made there.<\/p>\n

Adalberto Giazotto
The hidden music of the Universe<\/p>\n

[\/et_pb_text][et_pb_text module_id=”it_mirrors” _builder_version=”3.29.3″ hover_enabled=”0″ _i=”1″ _address=”0.2.0.1″]<\/p>\n

Virgo Mirrors<\/strong><\/span><\/h2>\n

Per costruire un interferometro di tre o quattro chilometri c\u2019\u00e8 bisogno di specchi di grandi dimensioni e di materiali purissimi, con lavorazioni industriali di un livello che poteva sembrare da fantascienza, allora\u2026 Per\u00f2 tre punti sono particolarmente importanti: la lunghezza effettiva dei bracci, la stabilit\u00e0 del laser e gli specchi<\/em>.<\/p>\n

Una delle sfide pi\u00fa ardite di Virgo \u00e8 stata, infatti, la fabbricazione degli specchi\u2026 \u00c8 stata una tensione continua verso la purezza pi\u00fa assoluta, una lotta contro la pi\u00fa piccola imperfezione. Tanto per cominciare gli specchi che usiamo non sono di tipo metallico, come quelli che abbiamo in casa o quelli che si adottano \u2026 in astronomia per i telescopi, ma sono costituiti da cristalli purissimi di quarzo, profilati con altissima precisione e rivestiti da un sottile strato detto coating<\/em>.<\/p>\n

In seguito a tale trattamento, uno specchio di questo tipo \u00e8 perfettamente (o quasi) riflettente da un lato e trasparente dall\u2019altro. Realizzare coatings<\/em> di alto livello \u00e8, al tempo stesso, una scienza molto sofisticata e un\u2019arte. A occuparsene per noi era un gruppo guidato dal fisico francese Jean-Marie Mackowski, una persona affabile e di grande rettitudine, un vero gentiluomo. A Lione aveva organizzato un laboratorio che si chiamava LMA, Laboratoire des Mat\u00e9riaux Avanc\u00e9s, in cui c\u2019erano grandi macchine capaci di depositare sotto vuoto strati di pentossido di tantalio e quarzo alternativamente \u2013 era questa la struttura del coating<\/em> \u2013 per mezzo di una tecnica detta sputtering<\/em>. Non \u00e8 importante conoscerne i dettagli, basti sapere che erano i migliori coatings<\/em> al mondo. Anche il coating<\/em> degli specchi di LIGO \u00e8 stato realizzato l\u00ed.<\/p>\n

Adalberto Giazotto
La musica nascosta dell\u2019Universo<\/p>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”1_4″ _builder_version=”3.29.3″ _i=”1″ _address=”0.2.1″][et_pb_text _builder_version=”3.29.3″ custom_padding=”||0px|||” link_option_url=”https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/IMG_0100.jpg” hover_enabled=”0″ _i=”0″ _address=”0.2.1.0″]<\/p>\n

\"\"<\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ admin_label=”Footer” _builder_version=”3.24″ background_size=”initial” background_repeat=”repeat-y” custom_padding=”0px|||||” global_module=”919″ saved_tabs=”all” locked=”off” fb_built=”1″ _i=”0″ _address=”1″][et_pb_row column_structure=”1_3,1_3,1_3″ use_custom_gutter=”on” gutter_width=”2″ _builder_version=”3.25″ custom_padding=”||14px|||” border_width_top=”2px” _i=”0″ _address=”1.0″][et_pb_column type=”1_3″ _builder_version=”3.25″ custom_padding=”|||” _i=”0″ _address=”1.0.0″ custom_padding__hover=”|||”][et_pb_text _builder_version=”3.29.3″ text_font=”||||||||” text_font_size=”12px” text_line_height=”2em” link_font=”||||on||||” link_text_color=”#666666″ header_font=”||||||||” header_text_align=”left” header_3_font=”|700||on|||||” header_3_font_size=”12px” header_3_letter_spacing=”5px” header_3_line_height=”1.8em” max_width_tablet=”70%” max_width_last_edited=”off|phone” header_3_font_size_last_edited=”on|desktop” locked=”off” _i=”0″ _address=”1.0.0.0″]<\/p>\n

MUSEO DELLA GRAFICA<\/h3>\n

Palazzo Lanfranchi
Lungarno Galilei, 9
56125 Pisa – Italia
https:\/\/museodellagrafica.sma.unipi.it\/<\/a><\/p>\n

[\/et_pb_text][et_pb_text _builder_version=”3.27.4″ text_font=”||||||||” text_font_size=”12px” text_line_height=”2em” link_font=”||||on||||” link_text_color=”#666666″ header_font=”||||||||” header_text_align=”left” header_3_font=”|700||on|||||” header_3_font_size=”12px” header_3_letter_spacing=”5px” header_3_line_height=”1.8em” max_width_tablet=”70%” max_width_last_edited=”off|phone” header_3_font_size_last_edited=”on|desktop” locked=”off” _i=”1″ _address=”1.0.0.1″]<\/p>\n

Open Hours<\/h3>\n

Monday – Sunday: 9am \u2013 8pm<\/p>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”1_3″ _builder_version=”3.25″ custom_padding=”|||” _i=”1″ _address=”1.0.1″ custom_padding__hover=”|||”][et_pb_text _builder_version=”3.29.3″ text_font=”||||||||” text_font_size=”12px” text_line_height=”2em” link_font=”||||on||||” link_text_color=”#666666″ header_font=”||||||||” header_text_align=”left” header_2_font=”||||||||” header_3_font=”|700||on|||||” header_3_font_size=”12px” header_3_letter_spacing=”5px” header_3_line_height=”1.8em” max_width_tablet=”70%” max_width_last_edited=”off|phone” custom_margin=”||1px|||” header_3_font_size_last_edited=”on|desktop” locked=”off” _i=”0″ _address=”1.0.1.0″]<\/p>\n

Follow\u00a0<\/h3>\n

[\/et_pb_text][et_pb_social_media_follow _builder_version=”3.29.3″ _i=”1″ _address=”1.0.1.1″][et_pb_social_media_follow_network social_network=”facebook” url=”https:\/\/www.facebook.com\/EGOVirgoCollaboration\/” _builder_version=”3.29.3″ background_color=”#3b5998″ follow_button=”off” url_new_window=”on” _i=”0″ _address=”1.0.1.1.0″]facebook[\/et_pb_social_media_follow_network][et_pb_social_media_follow_network social_network=”twitter” url=”https:\/\/twitter.com\/ego_virgo?lang=en” _builder_version=”3.29.3″ background_color=”#00aced” follow_button=”off” url_new_window=”on” _i=”1″ _address=”1.0.1.1.1″]twitter[\/et_pb_social_media_follow_network][\/et_pb_social_media_follow][et_pb_text _builder_version=”3.29.3″ custom_margin=”-24px|||||” custom_padding=”27px|||||” _i=”2″ _address=”1.0.1.2″]<\/p>\n

Key words for social share<\/strong>
@ego_virgo @CNRS @INFN_ @IN2P3_CNRS @APC_Laboratory @art_citoyen #GravitationalWaves #Ondegravitazionali #Blackholes #ArteScienza #RitmoSpazio19 #Spazio #Contemporaryart #Marconi #ComunediPisa #Unipi #MuseodellaGrafica\u00a0<\/span><\/p>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”1_3″ _builder_version=”3.25″ custom_padding=”|||” _i=”2″ _address=”1.0.2″ custom_padding__hover=”|||”][et_pb_text _builder_version=”3.29.3″ text_font=”||||||||” text_font_size=”12px” text_line_height=”2em” link_font=”||||on||||” link_text_color=”#666666″ header_font=”||||||||” header_text_align=”left” header_2_font=”||||||||” header_3_font=”|700||on|||||” header_3_font_size=”12px” header_3_letter_spacing=”5px” header_3_line_height=”1.8em” max_width_tablet=”70%” max_width_last_edited=”off|phone” custom_margin=”||3px|||” header_3_font_size_last_edited=”on|desktop” locked=”off” _i=”0″ _address=”1.0.2.0″]<\/p>\n

EGO-Virgo<\/h3>\n

[\/et_pb_text][et_pb_text _builder_version=”3.29.3″ text_font=”||||||||” text_font_size=”12px” text_line_height=”2em” link_font=”||||on||||” link_text_color=”#666666″ header_font=”||||||||” header_text_align=”left” header_3_font=”|700||on|||||” header_3_font_size=”12px” header_3_letter_spacing=”5px” header_3_line_height=”1.8em” max_width_tablet=”70%” max_width_last_edited=”off|phone” header_3_font_size_last_edited=”on|desktop” locked=”off” _i=”1″ _address=”1.0.2.1″]<\/p>\n

Via E. Amaldi
56021 Cascina – Italia
https:\/\/www.ego-gw.it\/<\/a><\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”3.29.3″ custom_padding=”0px|||||” _i=”1″ _address=”1.1″][et_pb_column type=”4_4″ _builder_version=”3.29.3″ _i=”0″ _address=”1.1.0″][et_pb_text _builder_version=”3.29.3″ custom_margin=”||-8px|||” _i=”0″ _address=”1.1.0.0″]<\/p>\n

Sponsored by:<\/strong><\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_6,1_6,1_6,1_6,1_6,1_6″ _builder_version=”3.29.3″ custom_padding=”9px|||||” _i=”2″ _address=”1.2″][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”0″ _address=”1.2.0″][et_pb_image src=”https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/comune_Pisa_logo_COLORE2.png” url=”https:\/\/www.comune.pisa.it\/it\/home” align=”center” align_last_edited=”on|phone” _builder_version=”3.29.3″ width=”30%” width_tablet=”20%” width_phone=”8%” width_last_edited=”on|phone” module_alignment=”center” _i=”0″ _address=”1.2.0.0″][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”1″ _address=”1.2.1″][et_pb_image src=”https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/logo-nuovo-museo-Grafica.png” url=”https:\/\/museodellagrafica.sma.unipi.it\/” align=”center” _builder_version=”3.29.3″ width=”36%” width_tablet=”20%” width_phone=”8%” width_last_edited=”on|phone” module_alignment=”center” _i=”0″ _address=”1.2.1.0″][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”2″ _address=”1.2.2″][et_pb_image src=”https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/UNIPI_Logo.png” url=”https:\/\/www.unipi.it\/” align=”center” _builder_version=”3.29.3″ width=”55%” width_tablet=”38%” width_phone=”19%” width_last_edited=”on|phone” module_alignment=”center” module_alignment_last_edited=”on|desktop” _i=”0″ _address=”1.2.2.0″][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”3″ _address=”1.2.3″][et_pb_image src=”https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/Logo-EGO_Virgo.png” url=”https:\/\/www.ego-gw.it\/index.aspx” align=”center” _builder_version=”3.29.3″ width=”55%” width_tablet=”40%” width_phone=”17%” width_last_edited=”on|phone” module_alignment=”center” custom_margin=”13px||13px||true|true” _i=”0″ _address=”1.2.3.0″][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”4″ _address=”1.2.4″][et_pb_image src=”https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/LOGO_F-Carasso_FR_RVB.jpg” url=”https:\/\/www.fondationcarasso.org\/” align=”center” _builder_version=”3.29.3″ width=”77%” width_tablet=”52%” width_phone=”25%” width_last_edited=”on|desktop” module_alignment=”center” custom_margin=”-8px|0px|-8px|0px|true|true” custom_padding=”|0px||0px|false|true” _i=”0″ _address=”1.2.4.0″][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”5″ _address=”1.2.5″][et_pb_image src=”https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/Logo80ANS_COMBINE_OR.png” url=”http:\/\/www.cnrs.fr\/fr\/page-daccueil” align=”center” _builder_version=”3.29.3″ width=”40%” width_tablet=”36%” width_phone=”16%” width_last_edited=”on|phone” module_alignment=”center” custom_margin_last_edited=”on|desktop” _i=”0″ _address=”1.2.5.0″][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_6,1_6,1_6,1_6,1_6,1_6″ _builder_version=”3.29.3″ _i=”3″ _address=”1.3″][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”0″ _address=”1.3.0″][et_pb_image src=”https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/LOGO_INFN_NEWS_sito.jpg” url=”http:\/\/home.infn.it\/it\/” align=”center” _builder_version=”3.29.3″ width=”54%” width_tablet=”42%” width_phone=”21%” width_last_edited=”on|phone” module_alignment=”center” width__hover_enabled=”off|desktop” _i=”0″ _address=”1.3.0.0″][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”1″ _address=”1.3.1″][et_pb_image src=”https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/logo_APC.png” url=”http:\/\/www.apc.univ-paris7.fr\/APC_CS\/” align=”center” _builder_version=”3.29.3″ width=”33%” width_tablet=”28%” width_phone=”13%” width_last_edited=”on|tablet” module_alignment=”center” custom_margin=”-9px||-9px||true|false” custom_margin_last_edited=”on|phone” _i=”0″ _address=”1.3.1.0″][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”2″ _address=”1.3.2″][et_pb_image src=”https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/RegioneToscanaLogo.png” url=”http:\/\/www.regione.toscana.it\/” align=”center” _builder_version=”3.29.3″ width=”27%” width_tablet=”21%” width_phone=”11%” width_last_edited=”on|desktop” module_alignment=”center” custom_margin=”-11px||-11px||true|false” _i=”0″ _address=”1.3.2.0″][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”3″ _address=”1.3.3″][et_pb_image src=”https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/sistema-museale-ateneo-pisa-SMA_Logo.png” url=”https:\/\/www.sma.unipi.it\/” align=”center” _builder_version=”3.29.3″ width=”63%” width_tablet=”49%” width_phone=”20%” width_last_edited=”on|phone” module_alignment=”center” custom_margin=”||||true” custom_margin_last_edited=”on|desktop” _i=”0″ _address=”1.3.3.0″][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”4″ _address=”1.3.4″][et_pb_image src=”https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/LOGO_RFPU-Vb2.jpg” url=”http:\/\/physiqueunivers.fr\/” align=”center” _builder_version=”3.29.3″ width=”44%” width_tablet=”31%” width_phone=”18%” width_last_edited=”on|desktop” module_alignment=”center” _i=”0″ _address=”1.3.4.0″][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_6″ _builder_version=”3.29.3″ _i=”5″ _address=”1.3.5″][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

WorksVirgo Mirrors In order to construct a three or four kilometre interferometer we needed large mirrors and very pure materials, with industrial processes of a level that might have seemed like science fiction, at the time … But three points are particularly important: the effective length of the arms, laser stability and mirrors. One of […]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-1128","page","type-page","status-publish","hentry"],"yoast_head":"\nwoa-mirrors - Il Ritmo Dello Spazio<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"woa-mirrors - Il Ritmo Dello Spazio\" \/>\n<meta property=\"og:description\" content=\"WorksVirgo Mirrors In order to construct a three or four kilometre interferometer we needed large mirrors and very pure materials, with industrial processes of a level that might have seemed like science fiction, at the time ... But three points are particularly important: the effective length of the arms, laser stability and mirrors. One of […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/\" \/>\n<meta property=\"og:site_name\" content=\"Il Ritmo Dello Spazio\" \/>\n<meta property=\"article:modified_time\" content=\"2019-10-17T14:37:06+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/IMG_0100.jpg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"12 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/\",\"url\":\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/\",\"name\":\"woa-mirrors - Il Ritmo Dello Spazio\",\"isPartOf\":{\"@id\":\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/IMG_0100.jpg\",\"datePublished\":\"2019-10-08T13:39:38+00:00\",\"dateModified\":\"2019-10-17T14:37:06+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/#primaryimage\",\"url\":\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/IMG_0100.jpg\",\"contentUrl\":\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/IMG_0100.jpg\",\"width\":3024,\"height\":4032},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"woa-mirrors\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/#website\",\"url\":\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/\",\"name\":\"Il Ritmo Dello Spazio\",\"description\":\"Da Marconi alle onde gravitazionali\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"woa-mirrors - Il Ritmo Dello Spazio","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/","og_locale":"en_US","og_type":"article","og_title":"woa-mirrors - Il Ritmo Dello Spazio","og_description":"WorksVirgo Mirrors In order to construct a three or four kilometre interferometer we needed large mirrors and very pure materials, with industrial processes of a level that might have seemed like science fiction, at the time ... But three points are particularly important: the effective length of the arms, laser stability and mirrors. One of […]","og_url":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/","og_site_name":"Il Ritmo Dello Spazio","article_modified_time":"2019-10-17T14:37:06+00:00","og_image":[{"url":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/IMG_0100.jpg"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"12 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/","url":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/","name":"woa-mirrors - Il Ritmo Dello Spazio","isPartOf":{"@id":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/#website"},"primaryImageOfPage":{"@id":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/#primaryimage"},"image":{"@id":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/#primaryimage"},"thumbnailUrl":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/IMG_0100.jpg","datePublished":"2019-10-08T13:39:38+00:00","dateModified":"2019-10-17T14:37:06+00:00","breadcrumb":{"@id":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/#primaryimage","url":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/IMG_0100.jpg","contentUrl":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-content\/uploads\/sites\/2\/2019\/10\/IMG_0100.jpg","width":3024,"height":4032},{"@type":"BreadcrumbList","@id":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/woa-mirrors\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/"},{"@type":"ListItem","position":2,"name":"woa-mirrors"}]},{"@type":"WebSite","@id":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/#website","url":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/","name":"Il Ritmo Dello Spazio","description":"Da Marconi alle onde gravitazionali","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-json\/wp\/v2\/pages\/1128","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-json\/wp\/v2\/comments?post=1128"}],"version-history":[{"count":4,"href":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-json\/wp\/v2\/pages\/1128\/revisions"}],"predecessor-version":[{"id":1304,"href":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-json\/wp\/v2\/pages\/1128\/revisions\/1304"}],"wp:attachment":[{"href":"https:\/\/sites.ego-gw.eu\/ilritmodellospazio\/wp-json\/wp\/v2\/media?parent=1128"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}