TRUE or FALSE
1.all types of electromagnetic waves is visible to human eye.
2.the number of cycles or times that a wave repeats in a second called "frequency".
3.radio waves have longer wavelength, low frequency, low energy and can pass through wall.
4.not all electromagnetic waves is important to humans.
5.microwave is used in wireless communications, navigation system, and emergency response system.
1.all types of electromagnetic waves is visible to human eye.
2.the number of cycles or times that a wave repeats in a second called "frequency".
3.radio waves have longer wavelength, low frequency, low energy and can pass through wall.
4.not all electromagnetic waves is important to humans.
5.microwave is used in wireless communications, navigation system, and emergency response system.
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Answer:
1.true
2.true
3.true
4.false
5.true
Explanation:
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