The origin of the universe Flashcards
1
Q
What is Red-shift?
A
when the light from other galaxies has appeared to have increased in wavelength.
2
Q
What does Red-shift show?
A
That the galaxies are moving away.
3
Q
The universe seems to be…
A
expanding
4
Q
What is the Doppler effect?
A
When something that emits waves moves towards you or away from you, the wavelengths and frequencies of the wave seem different.
5
Q
The frequency of a source moving towards you will seem ______ and its wavelength will seem _______
A
higher, shorter
6
Q
The further away a galaxy is the _______ the Red-shift
A
greater
7
Q
What is the big bang theory?
A
The theory that the universe began with one big explosion from a central point and has been expanding from that point ever since.
