Question

A concave mirror produces a three times enlarged virtual image of an object placed at 10cm infront of it cculate the radius of the curvature
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Answer 1

Answer:

Huh I guess tomorrow is your exam

Explanation:

m = 3 (virtual image)

u = - 10 cm

R = ?

We know that

m = - (v/u)

3 = -v/(-10)

V = 30 cm

And

1/v + 1/u = 1/f

1/30 + 1/(-10) = 1/f

-20/300 = 1/f

f = - 15 cm

Radius of curvature = R = 2f

= 2 × (-15) = - 30 cm

Answer 2

Explanation:

Given : 1.m = 3 (virtual image)

2.u = - 10 cm

To find: R = ?

Solution: We know that

m = - (v/u)

3 = -v/(-10)

V = 30 cm

And,

1/v + 1/u = 1/f

1/30 + 1/(-10) = 1/f

-20/300 = 1/f

f = - 15 cm

Radius of curvature = R = 2f

= 2 × (-15) = - 30 cm