A ray of light is incident at an angle α on the boundary separating two transparent media. It is transmitted. When angle a is increased very slightly ( by negligible amount ), the ray sufferes a total intenal reflection. The difference between the angles of deviation in two cases is :
2α
90∘−α
180∘−α
180∘−2α
A
2α
B
180∘−α
C
90∘−α
D
180∘−2α
Open in App
Solution
Verified by Toppr
Incident angle=α Reflected angle=900 Angle of deviation=900−α New angle of incidence=α+θ New angle of reflection=α+θ New angle of deviation1800−2(α+θ) As,the α is increased very slightly so,θ≃0. Thus,the New angle of deviation is 1800−2α
Was this answer helpful?
1
Similar Questions
Q1
A ray of light is incident at an angle α on the boundary separating two transparent media. It is transmitted. When angle a is increased very slightly ( by negligible amount ), the ray sufferes a total intenal reflection. The difference between the angles of deviation in two cases is :
View Solution
Q2
A ray of light incident on a transparent sphere at an angle π/4 and refracted at an angle r, emerges from the sphere after suffering one internal reflection. The total angle of deviation of the ray is?
View Solution
Q3
A light ray is incident at an angle 30o on a transparent surface separating two media. If the angle of refraction is 60o then critical angle is
View Solution
Q4
A light ray is incident a glass sphere at an angle of incidence of 45o as shown in figure. Find the total deviation suffered by ray of two successive reflection.
View Solution
Q5
A ray of light falls on the surface of spherical glass paperweight making an angle α with the normal and is refracted in the medium at an angle β. The angle of deviation of the emergent ray from the incident ray is