Which of the following statements about the electromagnetic waves is correct?
PHYSICS
WAEC 2011
Which of the following statements about the electromagnetic waves is correct?
- A. radio waves have longer frequencies than x-rays
- B. x-rays have the longest wavelength
- C. some of the waves travel at 3.0 x 108ms-1
- D. white light occupies a region beyond ultraviolet rays
Correct Answer: D. white light occupies a region beyond ultraviolet rays
Explanation
All electromagnetic waves:are transverse waves;can travel through a vacuum ;travel at exactly the same speed in a vacuum, the speed of light, 300,000,000 m/s.
The common designations are radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV) light, X-rays and gamma-rays.
ultraviolet rays lie beside violet of visible light and has a lesser frequency than visible light.
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