00:01
Alright, so let's say we have a graph of intensity versus wavelength for a certain object.
00:08
And it kind of looks like this.
00:11
I'm going to do a kind of lousy job reproducing this.
00:15
So it goes up, maybe not that much there.
00:22
And then as it goes back down, eventually has these dips.
00:27
And then it goes back up again and experiences some more dips.
00:33
And then comes back down.
00:34
And this, sorry, this peak should be lower than the next ones.
00:38
And so it should be labeled like a, b, c, d, and e, i think.
00:48
So the first question asks, which letter labels absorption lines? so they're actually two.
00:53
It's going to be c and d because we have light missing of certain wavelengths.
00:58
Then number two, which letters label the peak of infrared light? so that would be choice d because that's the longer wavelength...