{"id":90704,"date":"2025-06-01T10:34:06","date_gmt":"2025-06-01T10:34:06","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=90704"},"modified":"2025-06-01T10:34:06","modified_gmt":"2025-06-01T10:34:06","slug":"the-optical-phenomenon-responsible-for-the-blue-colour-of-sky-is","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-optical-phenomenon-responsible-for-the-blue-colour-of-sky-is\/","title":{"rendered":"The optical phenomenon responsible for the blue colour of sky is"},"content":{"rendered":"

The optical phenomenon responsible for the blue colour of sky is<\/p>\n

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

\n
\n
This question was previously asked in<\/div>\n
UPSC CAPF – 2022<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is D, scattering.
\n<\/section>\n
\nThe blue colour of the sky is primarily caused by the scattering of sunlight by molecules and tiny particles in the Earth’s atmosphere.
\nThis phenomenon is explained by Rayleigh scattering, which states that the amount of scattering is inversely proportional to the fourth power of the wavelength. Shorter wavelengths (like blue and violet) are scattered much more effectively than longer wavelengths (like red and orange).
\nWhen sunlight enters the atmosphere, the blue light is scattered in all directions by the atmospheric particles, making the sky appear blue. Our eyes are more sensitive to blue light than violet, contributing to the perception of a blue sky.
\n<\/section>\n
\nDispersion is the splitting of white light into its constituent colours due to different wavelengths having different refractive indices in a medium (like in a prism or rainbow). Reflection is the bouncing of light off a surface. Refraction is the bending of light as it passes from one medium to another. While refraction plays a role in atmospheric phenomena like mirages, it’s scattering that causes the blue sky.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

The optical phenomenon responsible for the blue colour of sky is [amp_mcq option1=”dispersion” option2=”reflection” option3=”refraction” option4=”scattering” correct=”option4″] This question was previously asked in UPSC CAPF – 2022 Download PDFAttempt Online The correct answer is D, scattering. The blue colour of the sky is primarily caused by the scattering of sunlight by molecules and tiny particles … <\/p>\n

Detailed SolutionThe optical phenomenon responsible for the blue colour of sky 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":[1085],"tags":[1108,1153,1128],"class_list":["post-90704","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1108","tag-optics","tag-physics","no-featured-image-padding"],"yoast_head":"\nThe optical phenomenon responsible for the blue colour of sky is<\/title>\n<meta name=\"description\" content=\"The correct answer is D, scattering. The blue colour of the sky is primarily caused by the scattering of sunlight by molecules and tiny particles in the Earth's atmosphere. This phenomenon is explained by Rayleigh scattering, which states that the amount of scattering is inversely proportional to the fourth power of the wavelength. Shorter wavelengths (like blue and violet) are scattered much more effectively than longer wavelengths (like red and orange). When sunlight enters the atmosphere, the blue light is scattered in all directions by the atmospheric particles, making the sky appear blue. Our eyes are more sensitive to blue light than violet, contributing to the perception of a blue sky.\" \/>\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-optical-phenomenon-responsible-for-the-blue-colour-of-sky-is\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The optical phenomenon responsible for the blue colour of sky is\" \/>\n<meta property=\"og:description\" content=\"The correct answer is D, scattering. The blue colour of the sky is primarily caused by the scattering of sunlight by molecules and tiny particles in the Earth's atmosphere. This phenomenon is explained by Rayleigh scattering, which states that the amount of scattering is inversely proportional to the fourth power of the wavelength. Shorter wavelengths (like blue and violet) are scattered much more effectively than longer wavelengths (like red and orange). When sunlight enters the atmosphere, the blue light is scattered in all directions by the atmospheric particles, making the sky appear blue. Our eyes are more sensitive to blue light than violet, contributing to the perception of a blue sky.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/the-optical-phenomenon-responsible-for-the-blue-colour-of-sky-is\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:34:06+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 optical phenomenon responsible for the blue colour of sky is","description":"The correct answer is D, scattering. 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The blue colour of the sky is primarily caused by the scattering of sunlight by molecules and tiny particles in the Earth's atmosphere. This phenomenon is explained by Rayleigh scattering, which states that the amount of scattering is inversely proportional to the fourth power of the wavelength. Shorter wavelengths (like blue and violet) are scattered much more effectively than longer wavelengths (like red and orange). When sunlight enters the atmosphere, the blue light is scattered in all directions by the atmospheric particles, making the sky appear blue. 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