Question 259: Waves

Question

When source of sound and observer both are moving towards each other, the observer will hear

Accepted Answer

We are dealing with the
Doppler effect
here.
When the source and the observer move
towards each other
:
The
observed frequency increases
(appears higher than the source frequency) because the sound waves are compressed.
The
wavelength decreases
(shorter wave crests between source and observer).
So the observer will hear a
higher frequency
and
shorter wavelength
.
Ã¢ÂÂ
Correct Answer: Option C Ã¢ÂÂ high frequency, low wavelength.

Answer

low frequency, low wavelength.

Answer

low frequency, high wavelength.

Answer

high frequency, low wavelength.

Answer

high frequency, high wavelength.

Waves

When source of sound and observer both are moving towards each other, the observer will hear

Choose the correct answer: