If a concave and convex lens of equal focus are

kwisangqaquqw3 2022-05-10 Answered
If a concave and convex lens of equal focus are kept in contact what is the effective focal length?
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Answers (1)

rynosluv101swv2s
Answered 2022-05-11 Author has 19 answers
When two lenses are kept in contact, powers of the lenses are simply added.
Power of a lens is positive for convex lens and negative for concave lens.
Numerically power of a lens is given by 100 f were f is focal length in centimeters.
As numerically, focal length is same but opposite in size, combined power will be
Zero i.e. focal length is i.e. it is just equivalent to plane glass,
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