Find the loaction of the image of a candle that is 6 cm from a concave mirror that has a focal length of 2 cm.

Question

1.Find the loaction of the image of a candle that is 6 cm from a concave mirror that has a focal length of 2 cm.

2.Find the height of the image of the same candle (from #1) if the candle is 3 cm high.

Answer 1

Answer 1 is right on the (convex) lens formula, which also applies to concave mirrors, so
i = 1 / (1/f - 1/o)
Once you solve that, you can get the image height Hi from
Hi / Ho = i / o
Simple, yes?

Answer 2

i think this is the lens equation

1/o + 1/i = 1/f

o = object distance = 0.06 m
i = image distance = ?
f = focal length = 0.02 m