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 reflection it makes before emerging from the other end is close to: (Refractive index of fibre is 1.31 and sin 40° = 0.64)
Physics · Geometrical optics · law of refraction and total internal reflection
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 reflection it makes before emerging from the other end is close to: (Refractive index of fibre is 1.31 and sin 40° = 0.64)
Options