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Rules of Ray Diagram for Representation of Image

How should tw...

Question

How should two converging lenses be placed so that a parallel beam becomes parallel after passing through two lenses?

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Solution

If we place two converging lens d cm apart, and $α = f_{1} + f_{2},$ here $f_{1}$ and $f_{2}$ are focal length of both the lens then parallel beam of light become parallel after passing through two lenses.

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