Question

21. A concave mirror radius of curvature 40cm is placed in front of an illuminated point source at a
distance of 30cm from it. Find the location of the image.
A) 40cm
B) 60cm
C) 35cm
D)30cm
​

Answer 1

Answer:

v = - 60

Explanation:

u=−30cm, R=−40cm

From the equation,

v

1

+

u

1

=

R

2

⇒

v

1

=

R

2

−

u

1

=

−40

2

−

−30

1

=−

60

1

or, v=−60cm

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