In figure, the optical fiber is l = 2 m long and has a diameter of d = 20 μm. If a ray of light is incident on one end of the fiber at angle θ1 = 40°, the number of reflections it makes before emerging from the other end is close to:(Refractive index of fiber is 1.31 and sin 40° = 0.64)

In figure, the optical fiber is l = 2 m long and has a diameter of d =

1.	In figure, the optical fiber is l = 2 m long and has a diameter of d = 20 μm. If a ray of light is incident on one end of the fiber at angle θ1 = 40°, the number of reflections it makes before emerging from the other end is close to:(Refractive index of fiber is 1.31 and sin 40° = 0.64)
A.	55000
B.	66000
C.	45000
D.	57000
Answer» E.

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In figure, the optical fiber is l = 2 m long and has a diameter of d = 20 μm. If a ray of light is incident on one end of the fiber at angle θ1 = 40°, the number of reflections it makes before emerging from the other end is close to:(Refractive index of fiber is 1.31 and sin 40° = 0.64)

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