Two converging lenses are to be placed in the path of parallel rays so that the rays remain parallel after passing through both lenses. How should the lenses be arranged? Explain with a neat ray diagram.
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Explanation:
parallel rays are converged at the 2nd principal focus of 1st converging lens. in order to obtained parallel rays from 2nd converging lens placed in such that it's 1st principal focus coincides with the 2nd principal focus of 1st converging lens.
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