COMPUTER NETWORKS AND COMMUNICATIONS
WIRELESS COMMUNICATION TECHNOLOGIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -These changing fields form electromagnetic waves. Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.
Detailed explanation-2: -Generally speaking, we say that light travels in waves, and all electromagnetic radiation travels at the same speed which is about 3.0 * 108 meters per second through a vacuum. We call this the “speed of light"; nothing can move faster than the speed of light.
Detailed explanation-3: -EM waves travel with the same speed in vacuum (or air) which is same as the speed of light ie. 3×108m/s.
Detailed explanation-4: -Light contains characteristics of both waves and particles. Particles are described as packets of energy, which are called photons. When light rays travel from one medium to another, like air to water, these linear paths are altered. So in the continuity of its motion, light travel in waves.