00:01
In this problem, you're given the moon's diameter, which is 3 .5 times 10 to the third kilometers, and we can multiply that by 10 to the third to convert that to meters.
00:09
You have the distance of the objects, so the distance from the earth is 3 .8 times 10 to the 5th kilometers.
00:16
Again, you can multiply that by 10 to the third to convert that to meters.
00:19
And then it's asking us to determine the position and size of the image formed by the hale telescope reflecting mirror, which has a focal length of 16 .9 meters.
00:29
So for this, we can use the thin lens equation.
00:33
So that's 1 over s .o plus 1 over s .i equals 1 over f.
00:40
And we're trying to solve for the distance of the image.
00:46
And so this s .o, sometimes problems will use s .o instead of d .o.
00:55
Either way, you'll get the same answer...