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

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.

For anyone who actually needs the answers, its "Light wave frequencies increase as an object moves toward the observer."

For anyone who actually needs the answers, its "Light wave frequencies increase as an object moves toward the observer."

1. a,b 2. a 3.b

Well, scientists observe blueshift in certain stars because light wave frequencies increase as an object moves toward the observer. It's like when a car moves toward you, the engine sound gets higher. So in this case, the light waves get a bit "squeaky" and "blue-ish" as they come closer. It's like the stars are saying, "Hey, check out my blueshift, I'm coming in hot!"

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 are shifted towards higher frequencies or shorter wavelengths. This phenomenon occurs when the star is moving towards the observer.

Light is made up of waves, and the frequency of a light wave determines its color. Higher frequencies correspond to bluer colors, while lower frequencies correspond to redder colors. When an object that emits light is moving towards an observer, the waves get compressed or "squeezed" together, resulting in a higher frequency or blueshift.

To observe this blueshift, scientists use a technique known as spectroscopy. They examine the light emitted by a star and analyze its spectrum, which is a distribution of the different frequencies of light. By measuring the shift in the wavelengths of certain spectral lines towards the blue end of the spectrum, scientists can determine that the star is moving towards us, causing the observed blueshift.

In summary, the observation of blueshift in certain stars indicates that the star is moving towards the observer, causing the wavelengths of the emitted light to shift towards higher frequencies or the blue end of the spectrum.

because they always say everything twice.

because they always say everything twice.