{"id":87304,"date":"2025-06-01T06:39:46","date_gmt":"2025-06-01T06:39:46","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87304"},"modified":"2025-06-01T06:39:46","modified_gmt":"2025-06-01T06:39:46","slug":"the-sun-is-observed-to-be-reddish-when-it-is-near-the-horizon-i-e-i","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-sun-is-observed-to-be-reddish-when-it-is-near-the-horizon-i-e-i\/","title":{"rendered":"The Sun is observed to be reddish when it is near the horizon, i.e., i"},"content":{"rendered":"

The Sun is observed to be reddish when it is near the horizon, i.e., in the morning and the evening. This is because<\/p>\n

[amp_mcq option1=”red light is least scattered by atmosphere” option2=”red light is most scattered by atmosphere” option3=”it is the colour of the Sun in the morning and evening” option4=”Earth’s atmosphere emits red light” correct=”option1″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC NDA-1 – 2015<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe scattering of sunlight by particles in the atmosphere is described by Rayleigh scattering. According to Rayleigh scattering, the intensity of scattered light is inversely proportional to the fourth power of its wavelength (I \u221d 1\/\u03bb\u2074). This means shorter wavelengths (like blue and violet) are scattered much more effectively than longer wavelengths (like red and orange). When the Sun is near the horizon, sunlight travels through a much greater thickness of the atmosphere. Most of the shorter-wavelength blue light is scattered away from the line of sight, leaving the longer-wavelength red and orange light to reach the observer, making the Sun appear reddish.
\n<\/section>\n
\nThe reddish appearance of the Sun at sunrise and sunset is due to the atmospheric scattering of light, specifically the preferential scattering of shorter wavelengths.
\n<\/section>\n
\nThe blue colour of the sky during the day is also a result of Rayleigh scattering, where the abundant blue light from the Sun is scattered in all directions across the sky.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

The Sun is observed to be reddish when it is near the horizon, i.e., in the morning and the evening. This is because [amp_mcq option1=”red light is least scattered by atmosphere” option2=”red light is most scattered by atmosphere” option3=”it is the colour of the Sun in the morning and evening” option4=”Earth’s atmosphere emits red light” … <\/p>\n

Detailed SolutionThe Sun is observed to be reddish when it is near the horizon, i.e., i<\/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":[1443,1153,1128],"class_list":["post-87304","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1443","tag-optics","tag-physics","no-featured-image-padding"],"yoast_head":"\nThe Sun is observed to be reddish when it is near the horizon, i.e., i<\/title>\n<meta name=\"description\" content=\"The scattering of sunlight by particles in the atmosphere is described by Rayleigh scattering. According to Rayleigh scattering, the intensity of scattered light is inversely proportional to the fourth power of its wavelength (I \u221d 1\/\u03bb\u2074). This means shorter wavelengths (like blue and violet) are scattered much more effectively than longer wavelengths (like red and orange). When the Sun is near the horizon, sunlight travels through a much greater thickness of the atmosphere. Most of the shorter-wavelength blue light is scattered away from the line of sight, leaving the longer-wavelength red and orange light to reach the observer, making the Sun appear reddish. The reddish appearance of the Sun at sunrise and sunset is due to the atmospheric scattering of light, specifically the preferential scattering of shorter wavelengths.\" \/>\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\/the-sun-is-observed-to-be-reddish-when-it-is-near-the-horizon-i-e-i\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Sun is observed to be reddish when it is near the horizon, i.e., i\" \/>\n<meta property=\"og:description\" content=\"The scattering of sunlight by particles in the atmosphere is described by Rayleigh scattering. According to Rayleigh scattering, the intensity of scattered light is inversely proportional to the fourth power of its wavelength (I \u221d 1\/\u03bb\u2074). This means shorter wavelengths (like blue and violet) are scattered much more effectively than longer wavelengths (like red and orange). When the Sun is near the horizon, sunlight travels through a much greater thickness of the atmosphere. Most of the shorter-wavelength blue light is scattered away from the line of sight, leaving the longer-wavelength red and orange light to reach the observer, making the Sun appear reddish. The reddish appearance of the Sun at sunrise and sunset is due to the atmospheric scattering of light, specifically the preferential scattering of shorter wavelengths.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/the-sun-is-observed-to-be-reddish-when-it-is-near-the-horizon-i-e-i\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:39:46+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":"The Sun is observed to be reddish when it is near the horizon, i.e., i","description":"The scattering of sunlight by particles in the atmosphere is described by Rayleigh scattering. According to Rayleigh scattering, the intensity of scattered light is inversely proportional to the fourth power of its wavelength (I \u221d 1\/\u03bb\u2074). This means shorter wavelengths (like blue and violet) are scattered much more effectively than longer wavelengths (like red and orange). When the Sun is near the horizon, sunlight travels through a much greater thickness of the atmosphere. Most of the shorter-wavelength blue light is scattered away from the line of sight, leaving the longer-wavelength red and orange light to reach the observer, making the Sun appear reddish. The reddish appearance of the Sun at sunrise and sunset is due to the atmospheric scattering of light, specifically the preferential scattering of shorter wavelengths.","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\/the-sun-is-observed-to-be-reddish-when-it-is-near-the-horizon-i-e-i\/","og_locale":"en_US","og_type":"article","og_title":"The Sun is observed to be reddish when it is near the horizon, i.e., i","og_description":"The scattering of sunlight by particles in the atmosphere is described by Rayleigh scattering. According to Rayleigh scattering, the intensity of scattered light is inversely proportional to the fourth power of its wavelength (I \u221d 1\/\u03bb\u2074). This means shorter wavelengths (like blue and violet) are scattered much more effectively than longer wavelengths (like red and orange). When the Sun is near the horizon, sunlight travels through a much greater thickness of the atmosphere. Most of the shorter-wavelength blue light is scattered away from the line of sight, leaving the longer-wavelength red and orange light to reach the observer, making the Sun appear reddish. The reddish appearance of the Sun at sunrise and sunset is due to the atmospheric scattering of light, specifically the preferential scattering of shorter wavelengths.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/the-sun-is-observed-to-be-reddish-when-it-is-near-the-horizon-i-e-i\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T06:39:46+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/the-sun-is-observed-to-be-reddish-when-it-is-near-the-horizon-i-e-i\/","url":"https:\/\/exam.pscnotes.com\/mcq\/the-sun-is-observed-to-be-reddish-when-it-is-near-the-horizon-i-e-i\/","name":"The Sun is observed to be reddish when it is near the horizon, i.e., i","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T06:39:46+00:00","dateModified":"2025-06-01T06:39:46+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The scattering of sunlight by particles in the atmosphere is described by Rayleigh scattering. 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