A convex lens of power 5D and a concave lens of power 7.5D are placed in contact with each other. a. What is the power of this combination? b. What is the focal length of this combination?
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Answered by
4
Answer:
hey mate here is ur answer
power of convex lens P1 : +5D
power of concave lens P2 : -7.5D
the combined power is the algebraic sum of the lenses.
hence, power of the combination P = P1 + P2
P = 5D - 7.5D
= -2.5D
hence power of combination is - 2.5 D
hope it helps you
Answered by
3
Answer:
dude alfdon vlogz here is ur answer mate
the power is
5D + (-7.5) = -2.5
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