Question

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

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.

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

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

Answer 1

The correct response is:

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

Blueshift occurs when an object emitting light (such as a star) is moving toward an observer. This motion causes the wavelengths of light to compress, resulting in a higher frequency and a shift toward the blue end of the spectrum.