Question

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

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.
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.

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

Answer 1

The correct response is:

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

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