HC Verma - Concepts of Physics Part 1

Book: HC Verma - Concepts of Physics Part 1

Chapter: 18. Geometrical Optics

Subject: Physics - Class 12th

Q. No. 30 of Exercises

Listen NCERT Audio Books to boost your productivity and retention power by 2X.

30

Light is incident from glass (μ = 1.50) to water (μ = 1.33). Find the range of the angle of deviation for which there are two angles of incidence.


Refractive index of glass is


Refractive index of water is


Critical Angle=


According to the question:


There will be two angles of incidence:


(1) When light ray passes through the normal


Angle of incidence =


Angle of refraction=


Angle of deviation =


(2) When light ray incident at critical angle


(As light ray is passing from glass to water)






Angle of deviation=


=


=


If angle of incidence increases beyond critical angle, total internal reflection will occur. So, the range of angle of deviation is


Chapter Exercises

More Exercise Questions