1. Choose the scenario under which each of the following Doppler shift effects w

Question

1. Choose the scenario under which each of the following Doppler shift effects will be seen:

choices are:

The source and observer are approaching one another

The source and observer are moving away from one another

The source and observer are stationary relative to one another

1.1 Light is shifted towards the blue end of the spectrum (blue-shifted).

1.2 The apparent pitch of the source is lower than the actual pitch of the source.

1.3 There is no apparent change in the pitch or color.

1.4 Light is shifted towards the red end of the spectrum (red-shifted).

1.5The apparent pitch of the source is higher than the actual pitch of the source.

2.Sounds coming from moving objects, such as the siren of an emergency vehicle, appear to change pitch as the object moves toward or away from you. Compare the frequency of a siren based on its motion toward or away from you.

rate from  highest to lowest

away from you 31 miles per hour

toward you at 34 miles per hour

away from you at 34 miles per hour

toward you at 55 miles per hour

neither toward nor away from you

toward you at 3 miles per hour

Explanation / Answer

1.1 The source and observer are moving away from one another

1.2 The source and observer are moving away from one another

1.3 The source and observer are stationary relative to one another

1.4 The source and observer are approaching one another

1.5 The source and observer are approaching one another

2.toward you at 55 miles per hour > toward you at 34 miles per hour > toward you at 3 miles per hour >neither toward nor away from you > away from you 31 miles per hour > away from you 34 miles per hour

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