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## Homework Statement

Hi!

I'm having a problem with one assignment and I would really need som help. The question is:

The Chandra X-ray telescope is used for observations in the 0.1-10 keV range. Focal

length is 10 m, max mirror radius is 0.6 m. What is the largest reflection angle in the optics

(assuming that both reflections are of the same size)?

## Homework Equations

## The Attempt at a Solution

I started first to find the wavelength by using the E=hc/λ formula. I got 12,4082 nm. After that, I'm stuck. Should I use a formula for concave mirrors? If yes, which one? I think that you need to place something in front of it to be able to calculate the angle. Glad if anyone could help :)