Redshift and Blueshift Quick Check

Question

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Question
Why do scientists observe blueshift in certain stars?(1 point)
Responses

Light wave frequencies increase as an object moves toward the observer.
Light wave frequencies increase as an object moves toward the observer.

Light wave frequencies decrease as an object moves toward the observer.
Light wave frequencies decrease as an object moves toward the observer.

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.

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.
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Answer 1

The correct response is:

Light wave frequencies increase as an object moves toward the observer.

This phenomenon is known as blueshift, which occurs when a light source is moving closer to an observer, causing the wavelengths of light to compress and shift towards the blue end of the spectrum.