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0. A converging bundle of light rays in the shape of cone with a vertex angle of 450 falls on a circular diaphragm of 20 cm diameter. A lens with power 5 D is fixed in the diaphragm. Diameter of face of lens is equal to that of diaphragm. If the vertex angle of new cone is θ , then tanθ = (NTSE Andhra Pradesh, Stage-I, 2015-16)
1.5
2
3
√3
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