THE DOPPLER EFFECT
1. TRUE or FALSE:
Ken Fused is standing on a corner when a police car passes by with its siren on. Ken hears a
different pitch when the police car is approaching him than when it is past him. This is
because the siren on the front of the car is set to a higher pitch than the siren on the back of
the car.
2. Describe the real reason Ken Fused observes what he does.
3. TRUE or FALSE:
The Doppler shift is a phenomenon that is observed only of sound waves.
Explain your
4. TRUE or FALSE:
As the source of a sound approaches an observer, the loudness of the sound increases. This
is an example of the Doppler Shift.
Explain your

Explanation:

1 ) False . The reason given in the problem is wrong .

2 ) When a source of sound approaches an observer , the frequency of the sound appears of having higher frequency . When it goes away from the observer , its sound  appears of having lower frequency . This is due to the phenomenon of  Doppler's effect .

3 ) The statement is false.

Doppler shift is a phenomenon which is found in light also . The frequency of light from distant stars coming towards the earth appears to have blue sift signalling increasing frequency . It is similar to doppler shift in sound.

4 ) The statement is true . When the source of sound approaches an observer , its intensity appears to increase due to apparent increase in the frequency due to Doppler's shift.

the answer is b ) square root of 5