Doppler Effect/Red Shift/Blue Shift

What is the cosmological redshift?

• A phenomenon caused by the gravitational pull of black holes on light.

• The redshift caused by the expansion of the universe, affecting the light from distant galaxies.

• A type of redshift that occurs only in nearby stars.

• A shift in light frequency due to the motion of an observer towards a light source.

What color corresponds to the longest wavelength in the visible spectrum?

• Blue

• Green

• Red

• Yellow

What is the significance of red shift in astronomy?

• Red shift indicates the presence of black holes.

• Red shift is used as evidence that the universe is expanding.

• Red shift proves that stars are moving closer to Earth.

• Red shift is a measure of the temperature of stars.

What does a blue shift indicate about an object's movement?

• A blue shift indicates that the object is moving away from the observer.

• A blue shift indicates that the object is moving towards the observer.

• A blue shift indicates that the object is stationary relative to the observer.

• A blue shift indicates that the object is accelerating away from the observer.

What is the Doppler Effect?

• The Doppler Effect is the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source.

• The Doppler Effect is the increase in amplitude of a wave as it approaches an observer.

• The Doppler Effect refers to the reflection of sound waves off a surface.

• The Doppler Effect is the phenomenon where light waves are absorbed by a medium.

What does a red shift indicate about an object's movement?

• The object is moving towards the observer.

• The object is stationary.

• The object is moving away from the observer.

• The object is rotating around a central point.

What is the effect of a star moving towards an observer on its light spectrum?

• A star moving towards an observer will exhibit a red shift in its light spectrum.

• A star moving towards an observer will exhibit a blue shift in its light spectrum.

• A star moving towards an observer will exhibit no change in its light spectrum.

• A star moving towards an observer will exhibit a green shift in its light spectrum.

What is the relationship between the wavelength of light and its color?

• Longer wavelengths correspond to blue, while shorter wavelengths correspond to red.

• The wavelength of light has no effect on its color.

• Longer wavelengths correspond to red, while shorter wavelengths correspond to blue.

• All colors of light have the same wavelength.

What is the role of the observer's motion in the Doppler Effect?

• The observer's motion has no effect on the perceived frequency of the waves.

• The observer's motion relative to the source of the wave affects the frequency and wavelength of the waves they perceive.

• The observer's motion only affects the amplitude of the waves.

• The observer's motion changes the speed of the waves but not their frequency.

What is the formula for calculating the Doppler shift?

• f' = f (v + vo) / (v - vs)

• f' = f (v - vo) / (v + vs)

• f' = f (v + vs) / (v - vo)

• f' = f (v - vs) / (v + vo)