Redshift and Blueshift Quick Check
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Question
Why do scientists observe blueshift in certain stars?(1 point)
Responses
Light wave frequencies decrease as an object moves toward the observer.
Light wave frequencies decrease as an object moves toward the observer.
Stars with lower temperatures emit more light waves at the blue end of the spectrum.
Stars with lower temperatures emit more light waves at the blue end of the spectrum.
Stars with higher temperatures emit more light waves at the blue end of the spectrum.
Stars with higher temperatures emit more light waves at the blue end of the spectrum.
Light wave frequencies increase as an object moves toward the observer.
5 answers
Light wave frequencies increase as an object moves toward the observer.
Redshift and Blueshift Quick Check
2 of 32 of 3 Items
Question
Which situations might cause two observers (A and B) to measure different frequencies for the same vibrating object? Select the two correct answers. (2 points)
Responses
Observer A and Observer B are both stationary and at the same distance from the object.
Observer A and Observer B are both stationary and at the same distance from the object.
Observer A and Observer B are moving at different speeds relative to each other.
Observer A and Observer B are moving at different speeds relative to each other.
Observer A is stationary and Observer B is moving.
Observer A is stationary and Observer B is moving.
Observer A and Observer B are stationary but at different distances from the vibrating object.
2 of 32 of 3 Items
Question
Which situations might cause two observers (A and B) to measure different frequencies for the same vibrating object? Select the two correct answers. (2 points)
Responses
Observer A and Observer B are both stationary and at the same distance from the object.
Observer A and Observer B are both stationary and at the same distance from the object.
Observer A and Observer B are moving at different speeds relative to each other.
Observer A and Observer B are moving at different speeds relative to each other.
Observer A is stationary and Observer B is moving.
Observer A is stationary and Observer B is moving.
Observer A and Observer B are stationary but at different distances from the vibrating object.
Observer A and Observer B are moving at different speeds relative to each other.
Observer A is stationary and Observer B is moving.
Observer A is stationary and Observer B is moving.
Redshift and Blueshift Quick Check
3 of 33 of 3 Items
Question
When will a scientist observe redshift in the spectrum of a distant space object?(1 point)
Responses
when the object is moving away from the scientist
when the object is moving away from the scientist
when the object is moving toward the scientist
when the object is moving toward the scientist
when the object is in the same frame of reference as the scientist
when the object is in the same frame of reference as the scientist
when the object is stationary
3 of 33 of 3 Items
Question
When will a scientist observe redshift in the spectrum of a distant space object?(1 point)
Responses
when the object is moving away from the scientist
when the object is moving away from the scientist
when the object is moving toward the scientist
when the object is moving toward the scientist
when the object is in the same frame of reference as the scientist
when the object is in the same frame of reference as the scientist
when the object is stationary
when the object is moving away from the scientist
1 answer