Which of the following lists contains three regions of the electromagnetic spectrum in order of increasing frequency?
Correct answer: C. Microwaves, ultraviolet rays, X-rays
- A. Gamma rays, ultraviolet rays, radio waves
- B. Gamma rays, visible radiation, ultraviolet rays
- C. Microwaves, ultraviolet rays, X-rays
- D. Radio waves, visible radiation, infrared radiation
Explanation
The electromagnetic spectrum is as such as wavelength decreases frequency increases, therefore the correct answer would be C ,as the question requires in order of increasing frequencies and gamma has the highest frequency, whereas in option D infrared has a higher frequency than ultra violet.
This question appeared on the ETEA MDCAT 2013 paper, which you can sit online with every answer explained.
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About Electromagnetic Waves
Electromagnetic waves consist of mutually perpendicular, oscillating electric and magnetic fields that also remain perpendicular to the direction of propagation. They travel through vacuum at the speed of light and include radio waves, microwaves, infrared, visible, ultraviolet, X-rays and gamma rays. Unlike mechanical waves, they do not require a material medium.
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