Question

sine i/ sine r = constant 1u2 , what is'u' ?​

Answer 1

Explanation

Snell's Law

=> According to snell's law the ratio of Sine of angle of incidence and sine of angle of reflection remains constant and this constant is equal to refractive index of 2nd medium with respect to refractive index of first medium

More information

Principle of reversibility

According to principle of reversibility the refractive index of first medium with respect to refractive index of second medium is reciprocal of refractive index of second medium with respect to refractive index of first medium

Law of refraction of light

i) Incident ray , normal ray and refracted ray all lie in same plane

ii) The product of refractive index of the medium and s8ne of angle of Incident

Proof

n × sin i = constant

n₁ × sin i₁ = n₂ × sin i₂

if i₁ = i and i₂ = r

n₁sin i = n₂sinr

sin i / sin r = n₂ / n₁ = n₂₁