Video #2 The Doppler Effect: what does motion do to waves?

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If the moving object is emitting light and not sound, it is not the pitch that is changing, it is the __________.

color

How do you detect sound waves that are being stretched out by a moving object?

A lower pitch

Blueshift is the technique astronomers use to tell which way a star is moving.

false (redshift).

How do you detect sound waves that are being compressed by a moving object?

A higher pitch

When a moving object is heading towards a stationary object what happens to the waves the object is emitting?

They bunch up or compress

When a moving object is heading away a stationary object what happens to the waves the object is emitting?

They stretch out or elongate

This apparent change of wave frequency is known as the Doppler Effect.

True


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