{"id":87730,"date":"2025-06-01T06:53:03","date_gmt":"2025-06-01T06:53:03","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87730"},"modified":"2025-06-01T06:53:03","modified_gmt":"2025-06-01T06:53:03","slug":"consider-the-following-statements-about-light-year-light-year-is","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-light-year-light-year-is\/","title":{"rendered":"Consider the following statements about Light year :\n \n Light year is"},"content":{"rendered":"<p>Consider the following statements about Light year :<\/p>\n<ul>\n<li>Light year is a unit for measurement of very large distances.<\/li>\n<li>Light year is a unit for measurement of very large time intervals.<\/li>\n<li>Light year is a unit for measurement of intensity of light.<\/li>\n<\/ul>\n<p>Which of the statements given above is\/are correct ?<\/p>\n<p>[amp_mcq option1=&#8221;1, 2 and 3&#8243; option2=&#8221;2 and 3 only&#8221; option3=&#8221;1 and 2 only&#8221; option4=&#8221;1 only&#8221; correct=&#8221;option4&#8243;]<\/p>\n<div class=\"psc-box-pyq-exam-year-detail\">\n<div class=\"pyq-exam\">\n<div class=\"psc-heading\">This question was previously asked in<\/div>\n<div class=\"psc-title line-ellipsis\">UPSC NDA-1 &#8211; 2021<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-nda-1-2021.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-nda-1-2021\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nStatement 1 is correct, while statements 2 and 3 are incorrect. A light-year is a unit of distance.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nA light-year is defined as the distance that light travels in vacuum in one Julian year (365.25 days). It is used to measure very large distances, particularly in astronomy.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\nThe approximate value of a light-year is 9.461 \u00d7 10\u00b9\u2075 meters or 63,241 astronomical units (AU). Other units of astronomical distance include the astronomical unit (AU) and the parsec (pc). The parsec is defined based on parallax and is approximately 3.26 light-years.<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Consider the following statements about Light year : Light year is a unit for measurement of very large distances. Light year is a unit for measurement of very large time intervals. Light year is a unit for measurement of intensity of light. Which of the statements given above is\/are correct ? [amp_mcq option1=&#8221;1, 2 and &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Consider the following statements about Light year :\n \n Light year is\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-light-year-light-year-is\/#more-87730\">Detailed Solution<span class=\"screen-reader-text\">Consider the following statements about Light year :<\/p>\n<p> Light year is<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1093],"tags":[1110,1140,1128],"class_list":["post-87730","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1110","tag-measurement-unit","tag-physics","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Consider the following statements about Light year :  Light year is<\/title>\n<meta name=\"description\" content=\"Statement 1 is correct, while statements 2 and 3 are incorrect. 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A light-year is defined as the distance that light travels in vacuum in one Julian year (365.25 days). It is used to measure very large distances, particularly in astronomy.","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:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-light-year-light-year-is\/","og_locale":"en_US","og_type":"article","og_title":"Consider the following statements about Light year :  Light year is","og_description":"Statement 1 is correct, while statements 2 and 3 are incorrect. A light-year is a unit of distance. A light-year is defined as the distance that light travels in vacuum in one Julian year (365.25 days). 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A light-year is a unit of distance. A light-year is defined as the distance that light travels in vacuum in one Julian year (365.25 days). 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