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3 cards from this section. Quick, good the night before a test.
What happens to the frequency of sound when the source moves towards you?
Think of the pitch of the sound.
What is the term for the increase in frequency as a source approaches an observer?
It relates to color perception.
What happens to the frequency when the source approaches an observer?
Think about how the sound changes as something moves closer.
The term 'blue shift' refers to which phenomenon?
What color represents higher frequency in light?
A rocket blasts off, producing a sound frequency of 2,000 Hz, and is moving towards a stationary observer at a speed of 100 m/s. Calculate the observed frequency if the speed of sound is 343 m/s.
Pay attention to whether the speeds are for the source or observer.
A cyclist moving at 15 m/s is listening to a phone ringing at a frequency of 800 Hz. If the sound speed is 340 m/s, what is the frequency perceived by the cyclist?
Remember to consider the direction of motion of the cyclist.
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