00:01
Okay, so we have a series of statements about galaxies and the relationship between redshift and blue shift.
00:09
So when we receive light from other galaxies, it may be redshifted or blue shifted, and redshift means that the light is moving away from us.
00:26
So it's kind of stretched out, it's longer.
00:28
So that equals moving away.
00:35
And blue shift means that the light is moving closer to us as it's being emitted.
00:44
So the object emitting it is moving closer and the wavelength gets smaller.
00:56
And according to the big bang theory, galaxies are moving further away.
01:16
So galaxies move away.
01:25
So universe is expanding.
01:28
Okay, so let's go through these options, and there are two of them that are true, so we'll find those.
01:33
All right, so the first one says galaxies further away have a bigger redshift.
01:39
So redshift means they're moving away.
01:43
So the galaxies that are further away are moving faster because that the redshift.
01:51
The light is shifted more to the red.
01:55
So this one is actually true.
01:56
It actually just goes along with big bang theory.
01:59
Galaxies further away are moving faster.
02:02
The ones that are closer are moving.
02:04
They're still moving away from us, but not quite as fast...