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:

Given magnification m=3

and object distance u=10 cm and we know,

Magnification m=

u

−v

−v=3×−10

v=30 cm

Thus the image is formed at distance of 30 cm.

Answered

Explanation:

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Answer 2

Answer:

6.66m in the side of object.

Explanation:

m = -3 , u = -20 cm, v= ?

m = -v/u

-3 = -(-20)/ u

u= 20/-3

u = -6.66 cm