Select the correct answer from each list.(2 points)

Question

When a vibrating object is moving an observer, the measured frequency of the vibrations will be lower than if the object and observer are both stationary. If the vibrating object is moving an observer, the measured frequency of the vibrations will be higher than the actual rate of vibration of the object. When a star is moving towards an observer on Earth, the light spectrum of the star will appear compared to the light spectrum of the sun, which is considered to be in Earth's frame of reference.

Answer 1

The correct answers for each statement are as follows:

1. When a vibrating object is moving away from an observer, the measured frequency of the vibrations will be lower than if the object and observer are both stationary.

2. If the vibrating object is moving towards an observer, the measured frequency of the vibrations will be higher than the actual rate of vibration of the object.

3. When a star is moving towards an observer on Earth, the light spectrum of the star will appear bluer compared to the light spectrum of the sun, which is considered to be in Earth's frame of reference.

So, the complete sentences would read:

1. When a vibrating object is moving away from an observer, the measured frequency of the vibrations will be lower than if the object and observer are both stationary.
2. If the vibrating object is moving towards an observer, the measured frequency of the vibrations will be higher than the actual rate of vibration of the object.
3. When a star is moving towards an observer on Earth, the light spectrum of the star will appear bluer compared to the light spectrum of the sun, which is considered to be in Earth's frame of reference.