Advertisements
Advertisements
Question
What do you understand by the deviation produced by a prism? Why is it caused?
Solution
Prism-produced Deviation is the bending of a light beam away from its intended path. Ray AB would have followed the path if there had been no prism. ABDF, but the prism has forced the light ray to bend twice in the direction of the prism's base, and the emerging beam EK seems to be coming from DEK.
Cause: When light travels from one medium to another, in this example, from air to a glass prism, its speed changes. This change in speed causes the light to deflect and enter the new medium glass at a different angle.
APPEARS IN
RELATED QUESTIONS
State the conditions required for total internal reflection of light to take place
State the relation between the critical angle and the absolute refractive index of a medium.
Solve the previous problem if the paperweight is inverted at its place so that the spherical surface touches the paper.
(i) Define critical angle.
(ii) State one important factor which affects the critical angle of a given medium.
Define critical angle for a given medium.
Why do diamonds sparkle?
Complete the following diagram to show the path of the ray of a single colour in the diagram as if enters in and emerges out of the prism. Mark the angles wherever necessary. (Critical angle for glass = 42°).
Answer the following question.
Under what conditions are total internal reflection possible? Explain it with a suitable example.
The outer concentric shell in optic fiber is called ______.
