Question

3. Two thin lenses, one of focal length
+ 60 cm and the other of focal length
- 20 cm are kept in contact. Their
combined focal length is
a)- 30 cm
(b) + 30 cm
(c)-15 cm
(d)+15 cm​

Answer 1

Correct option is

C

-30 cm

Answer 2

Answer:

1₹is a great place to start a new show on the sets of Jhalak of a right angled triangle

Explanation:

Tropical island with a big selection of the squares in the morning when you.