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When light ray travel from denser to rarer medium as the angle of incidence
Changes from 0 to 90 what happens to angle of deviation?

Asked by venkat 18th November 2017, 10:24 AM
Answered by Expert
Answer:
 
- The deviation angle first decreases with increasing incidence angle, and then it increases.
- The angle of incidence at which the sum of the two deflections is a minimum, at that point it is called "minimum deviation" angle.
- At the minimum deviation angle, the incidence and exit angles of the ray are identical.
- One of the reasons that causes a rainbow is the bundling of light rays at the minimum deviation that is close to the rainbow angle.
Answered by Expert 8th December 2017, 4:52 PM
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