Question

Assertion (A) :The power of a concave lens is -20 D. Reason (R): The power of a lens is reciprocal of its focal length.

a) Both A and R are true and R is correct explanation of the assertion
b) Both A and R are true but R is not the correct explanation of the assertion
c) A is true but R is false.
d) A is false but R is true.​

Answer 1

Answer:

Explanation:

b

Answer 2

Answer:

c is correct ok thank u slxsadvvngc

Explanation:

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