{"id":86142,"date":"2025-06-01T03:38:35","date_gmt":"2025-06-01T03:38:35","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=86142"},"modified":"2025-06-01T03:38:35","modified_gmt":"2025-06-01T03:38:35","slug":"which-one-of-the-following-phenomena-verifies-the-fact-that-light-trav","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-phenomena-verifies-the-fact-that-light-trav\/","title":{"rendered":"Which one of the following phenomena verifies the fact that light trav"},"content":{"rendered":"

Which one of the following phenomena verifies the fact that light travels much faster than sound?<\/p>\n

[amp_mcq option1=”Twinkling of stars in night sky” option2=”Lighting of a matchstick” option3=”Thunderstorm” option4=”Mirage” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CDS-2 – 2020<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe phenomenon of a thunderstorm clearly demonstrates that light travels much faster than sound. During a thunderstorm, lightning is a visual flash of light, and thunder is the sound produced by the rapid expansion of air heated by the lightning discharge. We always see the lightning first and then hear the thunder after a noticeable delay. This delay is because light travels at approximately 3 x 10\u2078 meters per second, while sound travels at approximately 343 meters per second in air (at 20\u00b0C), a speed difference of about a million times.
\n<\/section>\n
\nThe time difference between seeing lightning and hearing thunder during a thunderstorm proves that light travels significantly faster than sound.
\n<\/section>\n
\nTwinkling of stars is due to atmospheric refraction and unrelated to the speed of sound. Lighting a matchstick involves processes happening over very small distances where the speed difference isn’t noticeable. A mirage is an optical phenomenon related to atmospheric refraction and temperature gradients, not the speed difference between light and sound.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following phenomena verifies the fact that light travels much faster than sound? [amp_mcq option1=”Twinkling of stars in night sky” option2=”Lighting of a matchstick” option3=”Thunderstorm” option4=”Mirage” correct=”option3″] This question was previously asked in UPSC CDS-2 – 2020 Download PDFAttempt Online The phenomenon of a thunderstorm clearly demonstrates that light travels much faster … <\/p>\n

Detailed SolutionWhich one of the following phenomena verifies the fact that light trav<\/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":[1088],"tags":[1288,1128,1147],"class_list":["post-86142","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-2","tag-1288","tag-physics","tag-sound","no-featured-image-padding"],"yoast_head":"\nWhich one of the following phenomena verifies the fact that light trav<\/title>\n<meta name=\"description\" content=\"The phenomenon of a thunderstorm clearly demonstrates that light travels much faster than sound. During a thunderstorm, lightning is a visual flash of light, and thunder is the sound produced by the rapid expansion of air heated by the lightning discharge. We always see the lightning first and then hear the thunder after a noticeable delay. This delay is because light travels at approximately 3 x 10\u2078 meters per second, while sound travels at approximately 343 meters per second in air (at 20\u00b0C), a speed difference of about a million times. The time difference between seeing lightning and hearing thunder during a thunderstorm proves that light travels significantly faster than sound.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-phenomena-verifies-the-fact-that-light-trav\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following phenomena verifies the fact that light trav\" \/>\n<meta property=\"og:description\" content=\"The phenomenon of a thunderstorm clearly demonstrates that light travels much faster than sound. During a thunderstorm, lightning is a visual flash of light, and thunder is the sound produced by the rapid expansion of air heated by the lightning discharge. We always see the lightning first and then hear the thunder after a noticeable delay. This delay is because light travels at approximately 3 x 10\u2078 meters per second, while sound travels at approximately 343 meters per second in air (at 20\u00b0C), a speed difference of about a million times. The time difference between seeing lightning and hearing thunder during a thunderstorm proves that light travels significantly faster than sound.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-phenomena-verifies-the-fact-that-light-trav\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T03:38:35+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Which one of the following phenomena verifies the fact that light trav","description":"The phenomenon of a thunderstorm clearly demonstrates that light travels much faster than sound. 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