Derive an expression for the equivalent focal length of two lenses placed at a cirtain distance
Answers
Answered by
0
Answer:
Consider two lenses L1 and L2 separated by a small distance 'd' apart, as shown below.
A ray of light AB initially parallel to the principal axis hits the lens L1 and deviates and then hits lens L2. now, for the combination of the two lenses let F be the combined focal length.
Similar questions