Science, asked by komalkajal2005, 1 month ago

answer this question

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Answered by jintumonibhuyan3

1

Answer:

power is 1D

Explanation:

p1= +3.5D
p2=-2.5D
total power,P=3.5-2.5

p=1D

focal length of combination f=1/p

=>f=1

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