Question

A concave mirror produces three times magnified image on a screen. If the object is placed 20 cm in front of the mirror, how far is the screen from the object?

Answer 1

Answer:

distance of screen from mirror = image distance

Explanation:

magnification(m)= +3.0 or 3

object distance(u)= 20 cm

image distance(v)=  ?

   m= -v/u

=> 3 = -v/-20

=> v = 20 x 3

=> v= +60 cm

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