00:01
Question number six can be a bit annoying and maybe a bit confusing, but once you parse it all, it's not too bad.
00:08
So for part a, we want to find how far away we are from the first three images of ourselves.
00:17
So the first image is going to be from this single reflection off this mirror, and that is going to be this distance here, which if this, this is 1 .6 meters, that is 2.
00:39
So d1, it's going to be 3 .2 meters.
00:48
Well, let us move on.
00:51
Now to the second one, it's going to be actually the reflection of, we didn't draw of this one, but there is a reflection of your back on this mirror that's going to be reflected here.
01:08
So that is going to be this.
01:13
1 .6 plus the distance of you standing with your back to the mirror.
01:23
So you can write that as, what's the best way? so let's draw the distance first to here.
01:44
Oh, kind of a choppy line, sorry.
01:48
You can get that one by taking 1 .6 plus the 2 .3 plus the 2 .3 again, minus the 1 .6, which is basically just 2 times 2 .3.
02:10
That would have been the easiest way to get d2 being 4 .6 meters.
02:21
Ah, yes, that's very clear now.
02:22
We should have figured that out earlier...