Chapter 12, Problem 15Q

Is there a Doppler shift if the source and observer move in the same direction, with the same velocity? Explain

To determine

Whether there is a Doppler shift if the source and observer move in the same direction with the same velocity.

Answer to Problem 15Q

Solution:

No, the source and observer move in the same direction with the same velocity.

Explanation of Solution

For the Doppler shift, the source and the observer either get closer together or move away. If the source and observer move in the same direction with the same velocity, their distance can’t be changed.

Therefore, a Doppler shift can’t occur in this case.

Conclusion:

So, it is concluded that the source and observer move in the same direction with the same velocity.