The image formed of an object, placed 20 cm from a concave mirror, is four times the size of the image formed of the same object when placed 45 cm from the mirror. In both cases, the image formed was real. What is the focal length of the mirror?

Asked by Topperlearning User | 20th May, 2014, 12:53: PM

Expert Answer:

Answered by  | 20th May, 2014, 02:53: PM