{"id":84768,"date":"2025-06-01T02:49:34","date_gmt":"2025-06-01T02:49:34","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=84768"},"modified":"2025-06-01T02:49:34","modified_gmt":"2025-06-01T02:49:34","slug":"when-the-sun-is-near-the-horizon-during-the-morning-or-evening-it-app","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/when-the-sun-is-near-the-horizon-during-the-morning-or-evening-it-app\/","title":{"rendered":"When the Sun is near the horizon during the morning or evening, it app"},"content":{"rendered":"

When the Sun is near the horizon during the morning or evening, it appears reddish. The phenomenon that is responsible for this observation is<\/p>\n

[amp_mcq option1=”reflection of light” option2=”refraction of light” option3=”dispersion of light” option4=”scattering of light” correct=”option4″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CDS-1 – 2018<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe phenomenon responsible for the reddish appearance of the Sun near the horizon is scattering of light, specifically Rayleigh scattering. As sunlight passes through a longer path in the Earth’s atmosphere during sunrise or sunset, shorter wavelengths (blue and violet) are scattered away more effectively by air molecules than longer wavelengths (red and orange). The light that reaches the observer’s eyes is therefore enriched in the longer, redder wavelengths.
\n<\/section>\n
\n– Rayleigh scattering is inversely proportional to the fourth power of the wavelength (scattering \u221d 1\/\u03bb\u2074), meaning shorter wavelengths are scattered much more than longer wavelengths.
\n– The path length of sunlight through the atmosphere is longest at sunrise and sunset.
\n<\/section>\n
\nReflection is the bouncing of light off a surface. Refraction is the bending of light as it passes from one medium to another (e.g., causing the sun’s image to appear flattened at the horizon). Dispersion is the splitting of white light into its constituent colors based on wavelength (as in a prism or rainbow). While these phenomena occur, scattering is the primary reason for the reddish appearance of the sun and sky color variations.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

When the Sun is near the horizon during the morning or evening, it appears reddish. The phenomenon that is responsible for this observation is [amp_mcq option1=”reflection of light” option2=”refraction of light” option3=”dispersion of light” option4=”scattering of light” correct=”option4″] This question was previously asked in UPSC CDS-1 – 2018 Download PDFAttempt Online The phenomenon responsible for … <\/p>\n

Detailed SolutionWhen the Sun is near the horizon during the morning or evening, it app<\/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":[1087],"tags":[1114,1153,1128],"class_list":["post-84768","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-1","tag-1114","tag-optics","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhen the Sun is near the horizon during the morning or evening, it app<\/title>\n<meta name=\"description\" content=\"The phenomenon responsible for the reddish appearance of the Sun near the horizon is scattering of light, specifically Rayleigh scattering. As sunlight passes through a longer path in the Earth's atmosphere during sunrise or sunset, shorter wavelengths (blue and violet) are scattered away more effectively by air molecules than longer wavelengths (red and orange). The light that reaches the observer's eyes is therefore enriched in the longer, redder wavelengths. - Rayleigh scattering is inversely proportional to the fourth power of the wavelength (scattering \u221d 1\/\u03bb\u2074), meaning shorter wavelengths are scattered much more than longer wavelengths. - The path length of sunlight through the atmosphere is longest at sunrise and sunset.\" \/>\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\/when-the-sun-is-near-the-horizon-during-the-morning-or-evening-it-app\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"When the Sun is near the horizon during the morning or evening, it app\" \/>\n<meta property=\"og:description\" content=\"The phenomenon responsible for the reddish appearance of the Sun near the horizon is scattering of light, specifically Rayleigh scattering. As sunlight passes through a longer path in the Earth's atmosphere during sunrise or sunset, shorter wavelengths (blue and violet) are scattered away more effectively by air molecules than longer wavelengths (red and orange). The light that reaches the observer's eyes is therefore enriched in the longer, redder wavelengths. - Rayleigh scattering is inversely proportional to the fourth power of the wavelength (scattering \u221d 1\/\u03bb\u2074), meaning shorter wavelengths are scattered much more than longer wavelengths. - The path length of sunlight through the atmosphere is longest at sunrise and sunset.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/when-the-sun-is-near-the-horizon-during-the-morning-or-evening-it-app\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T02:49:34+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":"When the Sun is near the horizon during the morning or evening, it app","description":"The phenomenon responsible for the reddish appearance of the Sun near the horizon is scattering of light, specifically Rayleigh scattering. 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The light that reaches the observer's eyes is therefore enriched in the longer, redder wavelengths. - Rayleigh scattering is inversely proportional to the fourth power of the wavelength (scattering \u221d 1\/\u03bb\u2074), meaning shorter wavelengths are scattered much more than longer wavelengths. - The path length of sunlight through the atmosphere is longest at sunrise and sunset.","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\/when-the-sun-is-near-the-horizon-during-the-morning-or-evening-it-app\/","og_locale":"en_US","og_type":"article","og_title":"When the Sun is near the horizon during the morning or evening, it app","og_description":"The phenomenon responsible for the reddish appearance of the Sun near the horizon is scattering of light, specifically Rayleigh scattering. 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