Question

a concave mirror has a radius of curvature 50 cm what are two positions at which an object may be placed in order to give an image four times as larger
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Answer 1

Answer:

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Explanation:

ANSWER

Given,

Focal length, f=50cm

Magnification, m=2

m=

u

v

=2

v=2u

From mirror formula,

f

1

=

v

1

+

u

1

f

1

=

2u

1

+

u

1

u=

2

3f

=

2

3×50

=75 cm

Object Is placed at 75cm from the mirror.