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.
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 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.
Light wave frequencies increase as an object moves toward the observer.
The correct response is: "Light wave frequencies increase as an object moves toward the observer."
The correct answer is:
Light wave frequencies increase as an object moves toward the observer.
When scientists observe blueshift in certain stars, it means that the light waves emitted by those stars have higher frequencies than expected. This occurs when the star is moving towards the observer. As the star moves closer, the wavelengths of the light waves emitted by the star get compressed, resulting in an increase in frequency. This increase in frequency corresponds to a shift towards the blue end of the spectrum, which is why it is called blueshift.
To determine the blueshift in a star's light, scientists analyze the spectrum of the star. They use a spectroscope to separate the incoming light into its component wavelengths. By comparing the observed wavelengths with the known wavelengths of specific elements, they can determine the amount of shift and infer the star's motion towards the observer.