[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-443662-105":59,"doc-detail-443662-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","high-school-laser-demonstrations-pose-serious-threat","HIGH SCHOOL LASER DEMONSTRATIONS POSE SERIOUS THREAT","","A joint State-Federal survey in seven U.S. states identifies serious safety shortcomings in how potentially dangerous lasers are used in high school and college science classes. The study examined 288 lasers and found frequent misdirection of beams toward students or areas students might enter, deliberate exposure in some cases, and unsafe practices involving reflections from windows or glass objects. Many devices lacked warning signs or labels, and reported eye-retina burns underscore the risk.",{"@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":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/high-school-laser-demonstrations-pose-serious-threat/443662/",{"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/high-school-laser-demonstrations-pose-serious-threat/443662.png","ImageObject",300,407,{"name":92,"@type":93},"Bintang","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-09-29",true,{"@type":102,"interactionType":103,"userInteractionCount":81},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What did the survey find about laser safety practices in schools?","Question",{"text":112,"@type":113},"It found serious shortcomings, including beams being directed toward students or student pathways and unsafe use patterns involving reflections.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What documentation and labeling issues were reported for many lasers?",{"text":117,"@type":113},"Seventy-two percent were operated without warning signs, and 59% lacked warning labels.",{"name":119,"@type":110,"acceptedAnswer":120},"What injuries did the document cite as a risk from laser exposure?",{"text":121,"@type":113},"It notes reports of retina burns in the human eye from a laser output within the measured range, with similar effects reported in research monkeys.","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},443662,1792224888,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":81,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":44,"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,"preview_page_count":4},962085564381,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","December 1972volume 90,Number 6  \n# HIGH SCHOOL LASER DEMONSTRATIONS POSE SERIOUS THREAT\n\nA joint State-Federal survey in seven states has found veryserious shortcomings in safety practices in the use of potentiallydangerous lasers in high schoo1 and co1lege science classes.  \nFDA's Bureau of Radiological Health jointly surveyed 288lasers with state health agencies in Colorado,Florida,I1linois,Montana,Oklahoma,Pennsylvania,and Washington.  \nIn many cases,the survey found,laser beams were directedtowards students or areas through which students might pass.In a few instances,high s choo1 students were exposed to directlaser beams deliberately.One instructor said he wantedstudents to see a beautiful effect.  \nLasers frequent1y were used in situations where beams couldbe reflected in the direction of students from windows orglass objects.Seventy-two percent of the lasers were operatedwithout warning signs and 59%of them lacked warning labels.  \nA laser operating with a power cutput of 2 mW—we11 withinthe power range of most of the lasers measured during thesurvey—has been reported to have produced a burn in theretina of the human eye,FDA noted.Similar laser outputs,itwas pointed out,have been reported to have caused retinaburns in research monkeys.  \nPreliminary survey results have been sent to radiation contro1agencies in all states,the District of Columbia,PuertoRico,and the Virgin Islands.FDA also has provided theseagencies with recommendations to improve safety in operatingthe light intensifying devices and requested that therecommendations be provided to a11 s choo1 authorities.  \nAmong other safety precautions,FDA has recommended theavoidance of direct laser viewing,removal of objects withreflective surfaces from laser beam paths,blockage of the  \nCopyright®1972,by Industrial Research Inc.,222 s.RiversidePlaza,Chicago,I11.60606.Reproduction prohibited withoutpermission.  \nbeam when it is not needed,preparation and testing of laserdemonstrations when students are not present,use of key-locked switches to prevent the use of lasers by unauthorizedpersons,and adherence to the practice of not leaving operable1asers accessible and unattended.  \n# \"TWO-EYED\"TV TUBE ENHANCES COLOR CAMERA PERFORMANCE\n\nA new TV camera tube with two \"eyes,\"or targets,that isexpected to enhance the performance and lower the cost ofsingle tube color TV cameras has been developed by RCA.  \n\"Called a \"Bivicon\"tube,it was designed for the RCA \"HoloTape\"system and is particularly wel1 suited for generating colorpictures from two-frame holographic or photographic films inwhich the luminance(black-and-white)portion of the pictureis projected onto one target and the chroma information,in suitable encoded form,onto the second target,\"relatesDr.Wi1liam M.Webster,vice president of RCA Laboratories.  \nThe Bivicon tube provides excellent registry between theluminance and chroma information without additional auxiliarycoils because the beams generated by its two electron gunsare controlled by a single magnetic focus and deflection system.These beams \"read\"out the stored picture information from thetwo targets and provide simultaneous output signals that canbe superimposed with precision,Webster indicates.  \nA typical raster format for the \"Bivicon\"tube is 0.5 x 0.38 in.with center-to-center spacing of 0.41 in.The two rasters arescanned in paralle1 so that two simultaneous output signalsare generated.The output signals are provided from two sma11metal contact buttons on the tube's faceplate while meshcontact is made through a stud in the glass bu1b.A11 otherelectrical contacts are brought out through the tube base.  \n# LASER SAFETY cOURSE\n\nA short course on laser safety wi11 be offered at the LaserLaboratory of the University of Cineinnati from March 5 to 9.  \nThe course,covering al1 aspects of safe laser practices,isjoint1y sponsored by the Laser Institute of America,theContinuing Medical Education Office,and the Laser Laboratoryof the University of Cincinnati.  \nCos","cbCaifnaJqAS4aPi","https://ap.wps.com/l/cbCaifnaJqAS4aPi","pdf",2941511,"English","# HIGH SCHOOL LASER DEMONSTRATIONS POSE SERIOUS THREAT\n# \"TWO-EYED\" TV TUBE ENHANCES COLOR CAMERA PERFORMANCE\n# LASER SAFETY COURSE\n# DRIVERLESS TAXIS PROGRAMED BY MAGNETIC TICKET\n# TECHNICAL MANPOWER DEMAND UP","[{\"question\":\"What did the survey find about laser safety practices in schools?\",\"answer\":\"It found serious shortcomings, including beams being directed toward students or student pathways and unsafe use patterns involving reflections.\"},{\"question\":\"What documentation and labeling issues were reported for many lasers?\",\"answer\":\"Seventy-two percent were operated without warning signs, and 59% lacked warning labels.\"},{\"question\":\"What injuries did the document cite as a risk from laser exposure?\",\"answer\":\"It notes reports of retina burns in the human eye from a laser output within the measured range, with similar effects reported in research monkeys.\"}]","HIGH SCHOOL LASER DEMONSTRATIONS POSE SERIOUS THREAT | PDF",1790704856,23]