A science museum has created a huge concave mirror with a focal length of 5 m, a

Question

A science museum has created a huge concave mirror with a focal length of 5 m, and mounted it so that it covers the entire wall at one end of a long catwalk several meters above the floor. If you stand on a center line painted down the middle of the catwalk, you're on the mirror's principal axis. You and a friend are standing on the center line: you're 8 m from the mirror, and your friend is 20 m from it. Can your friend see the image of you created by the mirror? Explain.
Notes:
Don't worry about your being in the way of your friend's line of sight. The mirror is really, really big.
It's ok to make a calculation to figure this one out, but don't show the calculation, just cite the results to support your case.

Explanation / Answer

Yes, you will create a real image in the back of the mirror, so your friend would be able to see it.

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