Doppler Effect from Physics 101

  • Thread starter Ut-Napishtim
  • Start date
In summary, the Doppler Effect in this scenario is demonstrated as the first car seeing a red shift of the police car's lights, the second car seeing no shift, and the third car seeing a blue shift.
  • #1
Ut-Napishtim
27
0
Please help me with refreshing the Doppler Effect from Physics 101.

On a straight highway a police car is chasing three criminals’ cars each equipped with an unbelievably advanced spectrometer. The first car races faster, the second at the same exactly speed, and the third slower than the police car.

Looking back at the police’s lights criminals in the first car see those lights with a red spectral shift, in the second exactly as emitted with no shift, and in the third car with a blue shift.

Please respond just with YES if it is right, or NO if it is not.

Thank you for attention.
 
Physics news on Phys.org
  • #2
Yes, that's right.
 

1. What is the Doppler Effect from Physics 101?

The Doppler Effect is a phenomenon in physics where the frequency of a wave appears to change when the source of the wave is in motion relative to the observer.

2. How does the Doppler Effect work?

As a source of a wave moves closer to an observer, the frequency of the wave will appear to increase, resulting in a higher pitched sound. Conversely, as the source moves away from the observer, the frequency will appear to decrease, resulting in a lower pitched sound.

3. What is the difference between the Doppler Effect for sound and light waves?

The Doppler Effect for sound waves is known as a "Doppler shift" and is perceived as a change in pitch. The Doppler Effect for light waves is known as a "redshift" when the source is moving away and a "blueshift" when the source is moving closer, and is perceived as a change in color.

4. What are some real-life applications of the Doppler Effect?

The Doppler Effect is used in various technologies such as radar and sonar to measure the speed and distance of moving objects. It is also used in medical ultrasound to produce images of internal body structures.

5. How is the Doppler Effect related to the Big Bang Theory?

The Doppler Effect plays a crucial role in the Big Bang Theory, as it is used to explain the observed redshift of light from distant galaxies. This redshift is evidence that the universe is expanding, providing support for the theory of the Big Bang.

Similar threads

Replies
3
Views
2K
  • Classical Physics
2
Replies
64
Views
5K
  • Special and General Relativity
Replies
28
Views
2K
  • Astronomy and Astrophysics
Replies
13
Views
1K
  • Quantum Physics
Replies
2
Views
1K
Replies
18
Views
2K
  • Special and General Relativity
Replies
13
Views
1K
  • Introductory Physics Homework Help
Replies
1
Views
2K
Replies
2
Views
4K
  • Classical Physics
Replies
1
Views
1K
Back
Top