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## Homework Statement

The Hubble Space Telescope has a resolution of about 0.05 arc second. What is the smallest object it could see on the surface of the Moon? Give your answer in metres.

## Homework Equations

I tried to get my own equation since there was nothing relevant in my textbook, so I did

[tex]\theta[/tex]/360 degrees = distance/2[tex]\pi[/tex]r

But it's wrong (why?)

I went online and I found

[tex]\theta[/tex]/206265"=d/D

This gives the right answer but I don't understand where it came from.

## The Attempt at a Solution

The answer is 93m, I just don't get the formula