Which of the following electromagnetic waves has the smallest wavelength?
Correct answer: B. Gamma rays
- A. X-rays
- B. Gamma rays
- C. Microwaves
- D. Ultraviolet rays
Explanation
Gamma rays have the smallest wavelength of all electromagnetic waves, making them the highest in energy. They are positioned at the extreme end of the electromagnetic spectrum. X-rays, while also having short wavelengths, are longer than gamma rays. Microwaves and ultraviolet rays have significantly longer wavelengths compared to gamma rays, with microwaves being one of the longest in the spectrum.
This question appeared on the ETEA MDCAT 2016 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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