Question

36. On keeping an object at a distance of 30 cm from a
2.
concave lens, the formed size of an image is of
3
the size of the object. Find the focal length of lens.
[Ans. 60 cm]
2 u 2 x 30
[Hint: v =
= 20cm ]
3.
3​

Answer 1

Answer:

36. On keeping an object at a distance of 30 cm from a

2.

concave lens, the formed size of an image is of

3

the size of the object. Find the focal length of lens.

[Ans. 60 cm]

2 u 2 x 30

[Hint: v =

= 20cm ]

3.

3