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The intensity of electromagnetic wave B is four times that of wave A. How does the...

The intensity of electromagnetic wave B is four times that of wave A. How does the magnitude of the electric field amplitude of wave A compare to that of wave B?

The electric field amplitude of wave A is one-fourth that of wave B

The electric field amplitude of wave A is three times that of wave B

The electric field amplitude of wave A is two times that of wave.

The electric field amplitude of wave A is four times that of wave B

The electric field amplitude of wave A is one half that of wave B

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Answer #1

Intensity = (Electric field Amplitude)2

intensity of B wave

and intensity of A wave

According to question

so

It means The electric field amplitude of wave A is one half that of wave B.

# Last option is right.

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