In shell's law, the ratio of refractive indices of two media is n1:n2 is 2:1 and the angle of incidence is 30 find the angle of refraction? ( )
A) 30 B) 45 C) 60 D) 90
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Answer :
Ratio of refractive indices of two media = 2:1
Angle of incidence = 30°
We have to find angle of refraction
★ sin i/sin r = constant for any pair of media and for light of a given wave length. This is known as snell's law.
- n₁sin i = n₂sin r
i denotes angle of incidence
r denotes angle of refraction
⭆ n₁sin i = n₂sin r
⭆ n₁/n₂ × sin i = sin r
⭆ sin r = 2/1 × sin30°
⭆ sin r = 2 × 1/2
⭆ sin r = 1
⭆ r = 90°
Cheers!
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- Ratio of refractive indices of two media = 2:1
- Angle of incidence = 30°
- The angle of refraction.
↗ sin i/sin r = constant for any pair of media and for light of a given wave length.
(snell's law)
✧
Where,
↝ i is angle of incidence
↝ r is angle of refraction
Now,
➝n₁sin i = n₂sin r
➝ n₁/n₂ × sin i = sin r
➝sin r = 2/1 × sin30°
➝sin r = 2 × 1/2
➝sin r = 1
☞
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