{"id":87976,"date":"2025-06-01T06:58:57","date_gmt":"2025-06-01T06:58:57","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87976"},"modified":"2025-06-01T06:58:57","modified_gmt":"2025-06-01T06:58:57","slug":"which-one-of-the-following-statements-about-x-rays-is-not-true","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-x-rays-is-not-true\/","title":{"rendered":"Which one of the following statements about X-rays is not true ?"},"content":{"rendered":"

Which one of the following statements about X-rays is not true ?<\/p>\n

[amp_mcq option1=”They have wavelengths of about 1 \u00c5.” option2=”These can be generated by bombarding a metal target by high energy electrons.” option3=”Due to their wavelengths being shorter, these can be used for radar systems.” option4=”These are also used for the treatment of certain forms of cancer.” correct=”option3″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC NDA-1 – 2023<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nLet’s analyze each statement about X-rays:
\nA) They have wavelengths of about 1 \u00c5. X-rays are part of the electromagnetic spectrum with wavelengths typically ranging from 0.01 to 10 nanometers (0.1 to 100 \u00c5). So, a wavelength of 1 \u00c5 falls within this range. This statement is true.
\nB) These can be generated by bombarding a metal target by high energy electrons. This is the standard method for producing X-rays in an X-ray tube (using bremsstrahlung radiation and characteristic X-ray emission). This statement is true.
\nC) Due to their wavelengths being shorter, these can be used for radar systems. Radar systems work by transmitting electromagnetic waves and detecting the reflected signals. They typically use radio waves or microwaves (wavelengths from centimeters to meters). X-rays have much shorter wavelengths and high energy, which makes them highly penetrating. They are not suitable for radar applications, which rely on reflection from objects in the atmosphere or space. This statement is NOT true.
\nD) These are also used for the treatment of certain forms of cancer. High-energy X-rays are a common form of radiation therapy used to kill cancer cells. This statement is true.
\nTherefore, the statement that is not true about X-rays is C.
\n<\/section>\n
\nThis question tests knowledge about the properties and applications of X-rays, which are part of the electromagnetic spectrum.
\n<\/section>\n
\nX-rays are used in various fields including medical imaging (radiography, CT scans), industrial inspection, material analysis (X-ray crystallography), and security screening. Their penetrating power makes them useful for imaging internal structures.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following statements about X-rays is not true ? [amp_mcq option1=”They have wavelengths of about 1 \u00c5.” option2=”These can be generated by bombarding a metal target by high energy electrons.” option3=”Due to their wavelengths being shorter, these can be used for radar systems.” option4=”These are also used for the treatment of certain … <\/p>\n

Detailed SolutionWhich one of the following statements about X-rays is not true ?<\/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":[1105,1128,1274],"class_list":["post-87976","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1105","tag-physics","tag-wave-motion","no-featured-image-padding"],"yoast_head":"\nWhich one of the following statements about X-rays is not true ?<\/title>\n<meta name=\"description\" content=\"Let's analyze each statement about X-rays: A) They have wavelengths of about 1 \u00c5. X-rays are part of the electromagnetic spectrum with wavelengths typically ranging from 0.01 to 10 nanometers (0.1 to 100 \u00c5). So, a wavelength of 1 \u00c5 falls within this range. This statement is true. B) These can be generated by bombarding a metal target by high energy electrons. This is the standard method for producing X-rays in an X-ray tube (using bremsstrahlung radiation and characteristic X-ray emission). This statement is true. C) Due to their wavelengths being shorter, these can be used for radar systems. Radar systems work by transmitting electromagnetic waves and detecting the reflected signals. They typically use radio waves or microwaves (wavelengths from centimeters to meters). X-rays have much shorter wavelengths and high energy, which makes them highly penetrating. They are not suitable for radar applications, which rely on reflection from objects in the atmosphere or space. This statement is NOT true. D) These are also used for the treatment of certain forms of cancer. High-energy X-rays are a common form of radiation therapy used to kill cancer cells. This statement is true. Therefore, the statement that is not true about X-rays is C. This question tests knowledge about the properties and applications of X-rays, which are part of the electromagnetic spectrum.\" \/>\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-about-x-rays-is-not-true\/\" \/>\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 about X-rays is not true ?\" \/>\n<meta property=\"og:description\" content=\"Let's analyze each statement about X-rays: A) They have wavelengths of about 1 \u00c5. X-rays are part of the electromagnetic spectrum with wavelengths typically ranging from 0.01 to 10 nanometers (0.1 to 100 \u00c5). So, a wavelength of 1 \u00c5 falls within this range. This statement is true. B) These can be generated by bombarding a metal target by high energy electrons. This is the standard method for producing X-rays in an X-ray tube (using bremsstrahlung radiation and characteristic X-ray emission). This statement is true. C) Due to their wavelengths being shorter, these can be used for radar systems. Radar systems work by transmitting electromagnetic waves and detecting the reflected signals. They typically use radio waves or microwaves (wavelengths from centimeters to meters). X-rays have much shorter wavelengths and high energy, which makes them highly penetrating. They are not suitable for radar applications, which rely on reflection from objects in the atmosphere or space. This statement is NOT true. D) These are also used for the treatment of certain forms of cancer. High-energy X-rays are a common form of radiation therapy used to kill cancer cells. This statement is true. Therefore, the statement that is not true about X-rays is C. This question tests knowledge about the properties and applications of X-rays, which are part of the electromagnetic spectrum.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-x-rays-is-not-true\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:58:57+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=\"2 minutes\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Which one of the following statements about X-rays is not true ?","description":"Let's analyze each statement about X-rays: A) They have wavelengths of about 1 \u00c5. X-rays are part of the electromagnetic spectrum with wavelengths typically ranging from 0.01 to 10 nanometers (0.1 to 100 \u00c5). So, a wavelength of 1 \u00c5 falls within this range. This statement is true. B) These can be generated by bombarding a metal target by high energy electrons. This is the standard method for producing X-rays in an X-ray tube (using bremsstrahlung radiation and characteristic X-ray emission). This statement is true. C) Due to their wavelengths being shorter, these can be used for radar systems. Radar systems work by transmitting electromagnetic waves and detecting the reflected signals. They typically use radio waves or microwaves (wavelengths from centimeters to meters). X-rays have much shorter wavelengths and high energy, which makes them highly penetrating. They are not suitable for radar applications, which rely on reflection from objects in the atmosphere or space. This statement is NOT true. D) These are also used for the treatment of certain forms of cancer. High-energy X-rays are a common form of radiation therapy used to kill cancer cells. This statement is true. Therefore, the statement that is not true about X-rays is C. This question tests knowledge about the properties and applications of X-rays, which are part of the electromagnetic spectrum.","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\/which-one-of-the-following-statements-about-x-rays-is-not-true\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following statements about X-rays is not true ?","og_description":"Let's analyze each statement about X-rays: A) They have wavelengths of about 1 \u00c5. X-rays are part of the electromagnetic spectrum with wavelengths typically ranging from 0.01 to 10 nanometers (0.1 to 100 \u00c5). So, a wavelength of 1 \u00c5 falls within this range. This statement is true. B) These can be generated by bombarding a metal target by high energy electrons. This is the standard method for producing X-rays in an X-ray tube (using bremsstrahlung radiation and characteristic X-ray emission). This statement is true. C) Due to their wavelengths being shorter, these can be used for radar systems. Radar systems work by transmitting electromagnetic waves and detecting the reflected signals. They typically use radio waves or microwaves (wavelengths from centimeters to meters). X-rays have much shorter wavelengths and high energy, which makes them highly penetrating. They are not suitable for radar applications, which rely on reflection from objects in the atmosphere or space. This statement is NOT true. D) These are also used for the treatment of certain forms of cancer. High-energy X-rays are a common form of radiation therapy used to kill cancer cells. This statement is true. Therefore, the statement that is not true about X-rays is C. This question tests knowledge about the properties and applications of X-rays, which are part of the electromagnetic spectrum.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-x-rays-is-not-true\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T06:58:57+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-x-rays-is-not-true\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-x-rays-is-not-true\/","name":"Which one of the following statements about X-rays is not true ?","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T06:58:57+00:00","dateModified":"2025-06-01T06:58:57+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Let's analyze each statement about X-rays: A) They have wavelengths of about 1 \u00c5. 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D) These are also used for the treatment of certain forms of cancer. High-energy X-rays are a common form of radiation therapy used to kill cancer cells. This statement is true. Therefore, the statement that is not true about X-rays is C. 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