The refractive index of a material is 1.5. Calculate the critical angle at the glass-air interface?

by Sunday | Jan 26 | Physics WAEC | 0 comments

A. 19º
B. 21º
C. 39º
D. 42º

Correct Answer: Option D

D. 42º

Explanation

SinC = 1/n=1/1.5 = 0.6667

C = sin‾¹ 0.6667

= 42º

Users Also Read These:

$The refractive index of a medium relative to air is 1.8. Calculate to the nearest degree, the critical angle for the medium$
The refractive index of a medium relative to air is…
$A ray of light travelling from glass into ethyl alcohol is incident at the boundary at an angle of incidence 30°. Calculate the angle of refraction. [Refractive index of glass =1.5; refractive index of ethyl alcohol = 1.36]$
A ray of light travelling from glass into ethyl…
$The refractive index of a medium relative to air is 1.8. Calculate the critical angle for the medium to the nearest degree.$
The refractive index of a medium relative to air is…
$A ray of light incident at an angle θ in a rectangular prism grazes the surface of the prism on emerging from the prism. Determine the value of the angle. [Absolute refractive index of the material of the prism is 1.5]$
A ray of light incident at an angle θ in a…
$A beam of light is incident from air to water at an angle of 30°. Find the angle of refraction if the refractive index of water is 4/3?$
A beam of light is incident from air to water at an…