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.
Which situations might cause two observers (A and B) to measure different frequencies for the same vibrating object? Select the two correct answers. (2 points) Responses Observer A and Observer B are both stationary and at the same distance from the object. Observer A and Observer B are both stationary and at the same distance from the object. Observer A and Observer B are stationary but at different distances from the vibrating object. Observer A and Observer B are stationary but at different distances from the vibrating object. Observer A is stationary and Observer B is moving. Observer A is stationary and Observer B is moving. Observer A and Observer B are moving at different speeds relative to each other.
Observer A and Observer B are stationary but at different distances from the vibrating object.
Observer A and Observer B are moving at different speeds relative to each other.
When will a scientist observe redshift in the spectrum of a distant space object?(1 point) Responses when the object is in the same frame of reference as the scientist when the object is in the same frame of reference as the scientist when the object is stationary when the object is stationary when the object is moving toward the scientist when the object is moving toward the scientist when the object is moving away from the scientist
When the object is moving away from the scientist.
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.
When scientists observe blueshift in certain stars, it means that the light waves emitted by those stars have been shifted towards the higher frequency end of the spectrum, which corresponds to the blue part of the visible light spectrum.
This blueshift occurs because of the Doppler effect. The Doppler effect states that the frequency of waves (including light waves) changes depending on whether the source of the waves is moving towards or away from the observer.
In the case of stars, if a star is moving towards the observer, the waves of light it emits will be compressed, causing an increase in frequency. This increase in frequency results in the observed blueshift.
To determine whether a star is experiencing blueshift, scientists use spectroscopy. Spectroscopy involves analyzing the light emitted by celestial objects and breaking it down into its component wavelengths. By comparing the observed wavelengths to the known wavelengths of certain elements, scientists can determine if there is a shift towards higher frequencies (blueshift) or lower frequencies (redshift).
So, in summary, scientists observe blueshift in certain stars because the light waves emitted by those stars are experiencing an increase in frequency as the stars move towards the observer, due to the Doppler effect.