The slit of a collimator is illuminated by a source as shown in the adjoining figures. The dista...

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The slit of a collimator is illuminated by a source as shown in the adjoining figures. The distance between the slit \( S \) and the collimating lens \( L \) is equal to the focal length of the lens. The correct direction of the emergent beam will be as shown in figure
(A) 1
(B) 3
(C) 2
(D) None of the figures
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