Question

(i) Two lenses have power -1.5D and +3 D. What will be the power of the lenses combination?
(ii) Define 1 Dioptre

Answer 1

Answer:

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Answer 2

Answer:

i) 1.5D

Explanation:

Power of the lenses combination means sum of the powers of lenses.

-1.5D+3D= 1.5D

ii) 1 dioptre of power of a lens is described as the unit of measurement of the optical power of a lens or curved mirror equal to the reciprocal of focal length (f).

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