[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-570971-105":59,"doc-detail-570971-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","brent-libraries-reference-what-is-light","BRENT LIBRARIES - Reference - What Is Light?","","Educational reference text exploring extremes in light and sound, structured with a contents overview and chapter-style sections. It explains light as energy traveling in waves, introduces the visible spectrum and electromagnetic spectrum, and covers behaviors such as straight-line travel and refraction, plus reflection and color absorption. It then moves into measurements like wavelength, frequency, speed of light, and magnitude, linking brightness scales to absolute and apparent magnitude with examples drawn from space objects.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":15,"@type":76,"position":81},"https://docshare.wps.com/document/literature/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/brent-libraries-reference-what-is-light/570971/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/brent-libraries-reference-what-is-light/570971.png","ImageObject",300,407,{"name":92,"@type":93},"ahduag","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-22","2026-10-13",true,{"@type":102,"interactionType":103,"userInteractionCount":8},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is light, according to the text?","Question",{"text":112,"@type":113},"Light is a form of energy that travels in waves. The Sun is described as the main source of the light we can see.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What is the visible spectrum?",{"text":117,"@type":113},"The visible spectrum is the light and colours humans can see. It is only a small part of the electromagnetic spectrum, which also includes invisible forms like infrared and X-rays.",{"name":119,"@type":110,"acceptedAnswer":120},"How does the text explain measuring brightness in space?",{"text":121,"@type":113},"Astronomers measure brightness using magnitude. Actual brightness is called absolute magnitude, while how bright something appears from Earth is called apparent magnitude, measured on a scale where brighter objects have lower values.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},570971,1792667783,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":14,"category_name":15,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":8,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":36,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144},3985747870414,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","EXTREMESCIENCSPECTACULARLIGHTANDSOUi  \n# BRENT LIBRARIES\n\nPlease return/renew this itemby the last date shown.Books may also be renewed byphone or online.Tel:03333704700  \nOn-line www.brent.gov.uk/libraryservice91120000400303  \n# EXTREMESCIENCESPEGTACULARLIGHT\n\nAMDSOUN  \nWAYLANDwww.waylandbooks.co.uk  \nFirst published in Great Britainin 2019 by Wayland  \nCopyright ◎Hodder and Stoughton,2019All rights reservedEditor:Amy PimpertonText written by Rob Colson andJon Richards  \nProduced by Tall Tree Ltd  \nDesigners:Malcolm Parchment andBen Ruocco  \nHB ISBN:9781526307767PB ISBN:9781526307774Wayland  \nAn imprint of Hachette Children's GroupPart of Hodder and StoughtonCarmelite House50 Victoria EmbankmentLondon EC4Y ODZAn Hachette UK Companywww.hachette.co.ukwww.hachettechildrens.co.ukPrinted in ChinaPicture credits:  \nEvery attempt has been made toclear copyright.Should there be anyinadvertant omission,please apply tothe publisher for rectification.  \n\n| BRENT LIBRARIES  \u003Cbr>EAL   |  |\n| --- | --- |\n| 91120000400303   |  |\n| Askews &Holts   | 26-Apr-2019   |\n| J534 JUNIOR NON-FICT   | f12.99   |\n|  |  |\n\nCONTENTS  \nWHAT IS LIGHT?…  \n…………4  \nBRIGHTEST……………  \n……………6  \nDARKEST……………………  \n……………………8  \nVISION RANGES………………………………10  \nINVISIBLE EXTREMES…………………12  \nSEEING THE IMPOSSIBLE……………14  \nWHAT IS SOUND?…  \n…16  \nLOUDEST………  \n………………18  \nSOFTEST……………………  \n……………………20  \n…………………22  \nHIGH PITCH……………  \nLOW PITCH………………  \n………………24  \nSPEED OF SOUND…………  \n…………………26  \nMUSICAL EXTREMES……………………28  \nGLOSSARY…  \n………………30  \nINDEX………  \n……………32  \n# WHAT ISLIGHT?\n\nLight is a form of energy that travels in waves.The Sun is the main source of the light that wecan see,but there are lots of other light sources,including electric lights and even animals.  \n# VISIBLE LIGHT\n\nThe light that we can see and all its colours is known as the visiblespectrum.It forms a small part of the electromagnetic spectrum,whichalso contains invisible forms of energy,such as infrared and X-rays.Light rays travel in straight lines,but they can be bent when theypass from one material to another.  \nREFLECTING LIGHTColourObjects have a colour because theyabsorb all the other colours,and reflectonly that particular colour.A red ballwill reflect red light,but absorb all theother colours of light.  \n# ELECTRIC ANDMAGNETIC\n\nLight travels through space as a wave of energy.The distance between each peak of a wave is calledthe wavelength.The wavelength of visible lightThe number ofranges from violet at 380 billionths of a metre tocomplete cycles ofred at 750 billionths of a metre.light that pass throughone point in a secondElectricis called the  \nFREQUENCY.  \nVisible light has afrequency of morethan 400 trillion cyclesper second!  \n5Light tokes8minutesto reach us from the Sun.Light is the fastest thing in the Universe,andtravels at a speed of just under 300,000 km a  \n# SPEED OF LIGHT\n\nsecond.In one year,light travels 9.5 trillion km.SunThis distance is called a light year,andastronomers use it as a unit to measure theextreme distances across space.The closeststar to our Sun is Proxima Centauri,which is  \n4.22 light years from Earth.  \nBRIGHTESTWhile your bedroom lights might seem brightwhen they're turned on first thing in the morning,there are plenty of even brighter objects thatare really out of this world.Astronomers measure the brightness of objects in space using magnitude.An object's actual brightness is called its absolute magnitude.However,an object's brightness will get dimmer the further away it is.A super-bright object that is millions of light years away may appear as adim smudge in the night sky.How bright an object appears to someonestanding on Earth is called its apparent magnitude..Apparent magnitude is measured ina scale.The brighter an object,the lower its value of apparent magnitude.These are the nine brightestobjects in the sky,with their values of apparent magnitude.SunMoonVenusJupiterMars-26.74-12.7-4.89-2.94(star)-2.91(moon)(planet)(planet)(Planetsandstars notto scale)  ","cbCaijAL6Tw6bP8I","https://ap.wps.com/l/cbCaijAL6Tw6bP8I","pdf",4238193,"English","# WHAT IS LIGHT?\n## VISIBLE LIGHT\n## REFLECTING LIGHT\n## ELECTRIC AND MAGNETIC\n## SPEED OF LIGHT\n## BRIGHTEST\n## MEASURING BRIGHTNESS","[{\"question\":\"What is light, according to the text?\",\"answer\":\"Light is a form of energy that travels in waves. The Sun is described as the main source of the light we can see.\"},{\"question\":\"What is the visible spectrum?\",\"answer\":\"The visible spectrum is the light and colours humans can see. It is only a small part of the electromagnetic spectrum, which also includes invisible forms like infrared and X-rays.\"},{\"question\":\"How does the text explain measuring brightness in space?\",\"answer\":\"Astronomers measure brightness using magnitude. Actual brightness is called absolute magnitude, while how bright something appears from Earth is called apparent magnitude, measured on a scale where brighter objects have lower values.\"}]","BRENT LIBRARIES - Reference - What Is Light? | PDF",1791884110,62]