Front

What is the Doppler Effect?

Back

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.

Front

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

Back

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

Front

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

Back

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

Front

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

Back

Red corresponds to the longest wavelength in the visible spectrum.

Front

What is the significance of red shift in astronomy?

Back

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

Front

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

Back

The wavelength of light determines its color; longer wavelengths correspond to red, while shorter wavelengths correspond to blue.

Front

What type of galaxy is characterized by spiral arms?

Back

A spiral galaxy is characterized by its spiral arms.

Front

How does the expansion of the universe affect galaxies?

Back

The expansion of the universe causes galaxies to spread out or move apart from each other.

Front

What is the formula for calculating the Doppler shift?

Back

The formula for calculating the Doppler shift is: f' = f (v + vo) / (v - vs), where f' is the observed frequency, f is the source frequency, v is the speed of sound in the medium, vo is the speed of the observer, and vs is the speed of the source.

Front

What is the significance of the laboratory spectrum in Doppler Effect studies?

Back

The laboratory spectrum serves as a reference point to compare against the spectra of moving objects.