The slit of a collimator is illuminated by a source as shown in the adjoining figures. The distance
Channel: Doubtnut
Date: 19/01/2020

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 lengs `L` is equal to the focal length of the lens. The correct direction of the emergent beam will be as shown in figure.