{"id":88290,"date":"2025-06-01T07:07:12","date_gmt":"2025-06-01T07:07:12","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88290"},"modified":"2025-06-01T07:07:12","modified_gmt":"2025-06-01T07:07:12","slug":"which-one-of-the-following-statements-is-not-correct-37","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-37\/","title":{"rendered":"Which one of the following statements is not correct ?"},"content":{"rendered":"

Which one of the following statements is not correct ?<\/p>\n

[amp_mcq option1=”The longest wavelength of light visible to human eye is about 700 nm” option2=”The shortest wavelength of light visible to human eye is about 400 nm” option3=”The wavelength of gamma rays is longer than that of X-rays” option4=”The ability of a telescope to form separable images of close objects is called its resolving power” correct=”option3″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC NDA-2 – 2016<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
The electromagnetic spectrum is ordered by wavelength (or frequency\/energy). Moving from shorter wavelengths to longer wavelengths, the order is typically Gamma rays, X-rays, Ultraviolet, Visible light, Infrared, Microwaves, Radio waves. Therefore, gamma rays have shorter wavelengths than X-rays. The statement that the wavelength of gamma rays is longer than that of X-rays is incorrect.<\/section>\n
Order of electromagnetic spectrum components by increasing wavelength: Gamma < X-ray < UV < Visible < IR < Microwave < Radio.<\/section>\n
Statements A and B are correct descriptions of the approximate range of wavelengths for visible light, with red light (around 700 nm) having the longest wavelength and violet light (around 400 nm) having the shortest. Statement D provides a correct definition of resolving power, which is an important characteristic of optical instruments.<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following statements is not correct ? [amp_mcq option1=”The longest wavelength of light visible to human eye is about 700 nm” option2=”The shortest wavelength of light visible to human eye is about 400 nm” option3=”The wavelength of gamma rays is longer than that of X-rays” option4=”The ability of a telescope to form … <\/p>\n

Detailed SolutionWhich one of the following statements is not correct ?<\/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":[1094],"tags":[1098,1153,1128],"class_list":["post-88290","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1098","tag-optics","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhich one of the following statements is not correct ?<\/title>\n<meta name=\"description\" content=\"The electromagnetic spectrum is ordered by wavelength (or frequency\/energy). Moving from shorter wavelengths to longer wavelengths, the order is typically Gamma rays, X-rays, Ultraviolet, Visible light, Infrared, Microwaves, Radio waves. Therefore, gamma rays have shorter wavelengths than X-rays. The statement that the wavelength of gamma rays is longer than that of X-rays is incorrect. Order of electromagnetic spectrum components by increasing wavelength: Gamma < X-ray < UV < Visible < IR < Microwave < Radio.\" \/>\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-statements-is-not-correct-37\/\" \/>\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 statements is not correct ?\" \/>\n<meta property=\"og:description\" content=\"The electromagnetic spectrum is ordered by wavelength (or frequency\/energy). Moving from shorter wavelengths to longer wavelengths, the order is typically Gamma rays, X-rays, Ultraviolet, Visible light, Infrared, Microwaves, Radio waves. Therefore, gamma rays have shorter wavelengths than X-rays. The statement that the wavelength of gamma rays is longer than that of X-rays is incorrect. 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