Question

two thin lences of power 3.5d and -2.5dare kept in contact find the
total power of the combination​

Answer 1

Answer:

ans is given below

Explanation:

P=P

1

+P

2

⟹P=3.5−2

⟹P=+1.5D

Answer 2

Answer:

Its total power in combination will be 1 d.

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