When light of a certain wavelength is incident on a plane surface of a material at a glancing angle 30°, the reflected light is found to be completely plane polarised. Determine angle of refraction. (in degree)

Question

When light of a certain wavelength is incident on a plane surface of a material at a glancing angle 30°, the reflected light is found to be completely plane polarised. Determine angle of refraction. (in degree) (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

According to Brewster μ= tan i p μ= tan 60° μ=√3 sin r =( sin i /μ)=( sin 60°/√3)=(1/2) r =30°

Q. When light of a certain wavelength is incident on a plane surface of a material at a glancing angle $3 0^{\circ}$ , the reflected light is found to be completely plane polarised. Determine angle of refraction. (in degree)

According to Brewster
$μ = tan i_{p}$
$μ = tan 6 0^{\circ}$
$μ = 3$
$sin r = \frac{s i n i}{μ} = \frac{s i n 6 0 ^{\circ}}{3} = \frac{1}{2}$
$r = 3 0^{\circ}$

Q. When light of a certain wavelength is incident on a plane surface of a material at a glancing angle 30∘, the reflected light is found to be completely plane polarised. Determine angle of refraction. (in degree)

According to Brewster μ=tanip​ μ=tan60∘ μ=3​ sinr=μsini​=3​sin60∘​=21​ r=30∘

Q. When light of a certain wavelength is incident on a plane surface of a material at a glancing angle $3 0^{\circ}$ , the reflected light is found to be completely plane polarised. Determine angle of refraction. (in degree)

According to Brewster
$μ = tan i_{p}$
$μ = tan 6 0^{\circ}$
$μ = 3$
$sin r = \frac{s i n i}{μ} = \frac{s i n 6 0 ^{\circ}}{3} = \frac{1}{2}$
$r = 3 0^{\circ}$