{"id":86128,"date":"2025-06-01T03:38:15","date_gmt":"2025-06-01T03:38:15","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=86128"},"modified":"2025-06-01T03:38:15","modified_gmt":"2025-06-01T03:38:15","slug":"if-the-speed-of-light-in-air-is-represented-by-c-and-the-speed-in-a-me","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/if-the-speed-of-light-in-air-is-represented-by-c-and-the-speed-in-a-me\/","title":{"rendered":"If the speed of light in air is represented by c and the speed in a me"},"content":{"rendered":"

If the speed of light in air is represented by c and the speed in a medium is v, then the refractive index of the medium can be calculated using the formula<\/p>\n

[amp_mcq option1=”v \/ c” option2=”c \/ v” option3=”c \/ (2. v)” option4=”(c – v) \/ c” correct=”option2″]<\/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 refractive index of the medium can be calculated using the formula c \/ v.
\n<\/section>\n
\nThe refractive index (n) of a medium is a dimensionless quantity that describes how fast light travels through the medium. It is defined as the ratio of the speed of light in vacuum (c\u2080) to the speed of light in the medium (v). Air is often used as an approximation for vacuum, so if the speed of light in air is represented by c and the speed in the medium is v, the refractive index is given by n = c \/ v.
\n<\/section>\n
\nThe refractive index is always greater than or equal to 1 (n \u2265 1), with n=1 for vacuum (or approximately for air). A higher refractive index means light travels slower in the medium and bends more when entering from a medium with a lower refractive index.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

If the speed of light in air is represented by c and the speed in a medium is v, then the refractive index of the medium can be calculated using the formula [amp_mcq option1=”v \/ c” option2=”c \/ v” option3=”c \/ (2. v)” option4=”(c – v) \/ c” correct=”option2″] This question was previously asked in … <\/p>\n

Detailed SolutionIf the speed of light in air is represented by c and the speed in a me<\/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":[1288,1153,1128],"class_list":["post-86128","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-2","tag-1288","tag-optics","tag-physics","no-featured-image-padding"],"yoast_head":"\nIf the speed of light in air is represented by c and the speed in a me<\/title>\n<meta name=\"description\" content=\"The refractive index of the medium can be calculated using the formula c \/ v. The refractive index (n) of a medium is a dimensionless quantity that describes how fast light travels through the medium. It is defined as the ratio of the speed of light in vacuum (c\u2080) to the speed of light in the medium (v). Air is often used as an approximation for vacuum, so if the speed of light in air is represented by c and the speed in the medium is v, the refractive index is given by n = c \/ v.\" \/>\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\/if-the-speed-of-light-in-air-is-represented-by-c-and-the-speed-in-a-me\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"If the speed of light in air is represented by c and the speed in a me\" \/>\n<meta property=\"og:description\" content=\"The refractive index of the medium can be calculated using the formula c \/ v. The refractive index (n) of a medium is a dimensionless quantity that describes how fast light travels through the medium. It is defined as the ratio of the speed of light in vacuum (c\u2080) to the speed of light in the medium (v). 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