MCQ
Generation, propagation and detection of electromagnetic waves is the basis of:
- ALasers
- BReactors
- ✓Radio and television
- DComputer
✓
Answer
Correct option: C.
Radio and television
The communication and broadcasting following the base on generation, propagation, and detection of electromagnetic waves.
The electromagnetic spectrum describes a different range of electromagnetic waves. These $\text{EM}$ waves are a special type of wave that can travel without a medium.
Electromagnetic waves are named like this due to the fact that they have both an electric and a magnetic component. In a vacuum, $\text{EM}$ waves always travel at the same speed i.e. the speed of light. So, other $\text{EM}$ waves besides light are infrared, ultraviolet, radio waves, and microwaves.
Therefore radio and television both are based on $\text{EM}$ wave properties. Other options like lasers, reactors, and computers are not guided by $\text{EM}$ waves.
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