Question

A converging mirror forms a real image of height 1cm placed 20 cm away from the mirror. Calculate the image distance. What Is the focal length of the mirror?​

Answer 1

Answer:

Magnification m= u/−v

−4=−20/−v

v=−80cm

From mirror formula

v/1+u/1 = f/1

−801 +−20/1 = f/1

f/1 =−80/1+4

f=−16cm

Thus focal length of converging mirror is 16 cm.

Explanation:

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