Derive the expression for coordinal Point of thin lenses?
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hey mate❤here is your answer
Let a point O is placed on the common principal axis, f1 and f2 be the focal lengths of lenses L1 and L2.
here I1 means image formed by the first lensL1 act as a virtual object to the second lensL2 and the final image of the combination will be formed at I.
For only first lens:
1/f1 = 1/v1 - 1/u
for second lens:
1/f2 = 1/v - 1/v1
adding both equations:
1/f1 + 1/f2 = 1/v - 1/u
if the lens combination is replaced by a single lens of focal length 'f' then
1/f = 1/v - 1/u
from above equations it is clear that
1/f=1/f1+1/f2
Explanation:
hope it helps u mark as brainliest n follow plz.
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