Which of the following has the least wavelength?
Correct answer: C. Cosmic rays
- A. Alpha rays
- B. X_rays
- C. Cosmic rays
- D. Beta rays
Explanation
Cosmic rays are high-energy particles that come from outside our solar system. They can have a wide range of energies and wavelengths, depending on their source.
This question appeared on the ETEA MDCAT 2009 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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