Question

A 25 cm tall stuffed toy is placed at a distance of 50 cm in front of a concave lens of focal length 100 cm. This is shown in the figure below

Answer 1

Explanation:

Given : u=−25 cm f=−10 cm h

o

=5 cm

Using

v

1

−

u

1

=

f

1

Or

v

1

−

(−25)

1

=

(−10)

1

⟹ v=−7.14 cm

Height of image

h

o

h

i

=

u

v

Or

5

h

i

=

−25

−7.14

⟹ h

i

=1.43