Question

Radhika uses spectacles made of two thin lenses kept in contact with each other. Find the focal length of a combination of lenses if the individual power of the lens is +2.5 d and 1.5

d.

Answer 1

Please mark this as brainliest.

Answer 2

P1=+2.5. P2= 1.5

P = P1 + P2

P = 2.5 + 1.5

P = 4D

P = 1/ f

4D = 1/f

f = 1/4D

f = 0.25 m