A converging bundle of light rays in the shape ofcone with a vertex an – InterviewSolution

1.	A converging bundle of light rays in the shape ofcone with a vertex angle of 45 falls on a circulardiaphragm of 20 cm diameter. A lens with power5 D is fixed in the diaphragm. Diameter of face oflens is equal to that of diaphragm. If the vertexangle of new cone is θ , then tanθ = (1) 1.5(2) 2 (3) \sqrt3 (4) 3
Answer» A converging bundle of light rays in the shape ofcone with a vertex angle of 45 falls on a circulardiaphragm of 20 cm diameter. A lens with power5 D is fixed in the diaphragm. Diameter of face oflens is equal to that of diaphragm. If the vertexangle of new cone is θ , then tanθ = (1) 1.5(2) 2 (3) \sqrt3 (4) 3

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