Which type of electromagnetic radiation has the longest wavelength?
Correct answer: C. Microwave
- A. Gamma rays
- B. UV
- C. Microwave
- D. X-rays
Explanation
In the given electromagnetic spectrum it can be seen that wavelength increases from gamma rays towards radio waves and frequency decreases. Hence among gamma rays, x-rays, UV radiations and radio waves, RADIO WAVES have the longest wavelength (hence the answer is C).
This question appeared on the ETEA MDCAT 2005 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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