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Doppler Effect

The audio/vid...

Question

The audio/video system or a computer reads the CD using-

A

Laser beam

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B

Radio wave

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C

Electromagnetic wave

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D

None of these

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Solution

The correct option is A Laser beam
In a CD player a semiconductor laser reads data codes as pits arranged in a spiral.so,the audio/video system or a computer reads the CD using a laser beam.

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