The Universe - Doppler Effect and Redshift Flashcards
1
Q
What is the doppler effect?
A
Waves are observed to be stretched out when they are emitted by an object moving away from the observer.
2
Q
What wavelength has the largest length?
A
Red light has longer wavelengths than other visible light.
3
Q
How does the absorption spectra effect redshift?
A
The observed light spectrum from a star show blanks in the light wavelength absorbed by the gas that surround them
4
Q
How are the dark bands shifted on the absorption spectra?
A
The darks bands on absorption spectra from stars in distant galaxies are observed to be shifted to the red end of the light spectrum.
5
Q
What does the shift towards the red end indicate?
A
It indicated that the light waves are stretching out and therefore the stars are moving away from earth.
