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3 years ago

A concave lens of power -2D is placed in contact with a convex lens of power +1.5D what will be the resultant power

Physics

1 answer:

jok3333 [9.3K]3 years ago

5 0

Answer: -0.5 D

Explanation:

The resultant power can be defined as the sum of powers of all the lenses placed in contact together.

P =P₁ + P₂ + P₃ +....

It is given that power of the concave lens is, P₁ = -2 D

Power of the convex lens is, P₂ = +1.5 D

Thus, the resultant power when these two lenses are placed in contact with each other are: P = P₁ + P₂ = -2 D + 1.5 D = -0.5 D.

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