When will a scientist observe redshift in the spectrum of a distant space object?(1 point) Responses when the object is stationary when the object is stationary when the object is moving away from the scientist when the object is moving away from the scientist 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 moving toward the scientist

Answer 1

A scientist will observe redshift in the spectrum of a distant space object when the object is moving away from the scientist.

Answer 2

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 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.

Answer 3

Scientists observe blueshift in certain stars because light wave frequencies increase as an object moves toward the observer. When a star is moving closer to the observer, the wavelengths of the light it emits become compressed, resulting in a shorter wavelength, which is perceived as blueshift. Therefore, the observed blue shift can indicate that the star is moving towards the scientist. It is important to note that this is different from stars with higher temperatures emitting more light waves at the blue end of the spectrum, which is also true but not directly related to the observation of blueshift.

Answer 4

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 moving at different speeds relative to each other. 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 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 both stationary and at the same distance from the object.

Answer 5

The two correct answers are:

1. Observer A and Observer B are moving at different speeds relative to each other.
2. Observer A and Observer B are stationary but at different distances from the vibrating object.

These situations can cause the two observers to measure different frequencies for the same vibrating object. When observers are moving at different speeds relative to each other, the Doppler effect comes into play, causing a shift in the observed frequency. Additionally, when observers are at different distances from the vibrating object, they experience different levels of attenuation or amplification of the waves, which can result in a change in the measured frequency.