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A converging bundle of light rays in the shape of cone with a vertex angle of 45 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 ' then tan

(a)

1.5

(b)

2

(c)

3

(d)


Question ID - 101133 | Toppr Answer

A converging bundle of light rays in the shape of cone with a vertex angle of 45 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 ' then tan

(a)

1.5

(b)

2

(c)

3

(d)

1 Answer - 5876 Votes

3537

Answer Key : (a) -

1.5



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