Fri January 06, 2012 By:

why there are 2 values of angle of deviation for 1 value of angle of incidence?

Expert Reply
Mon January 09, 2012
The  minimum deviation is the angle between the incident and emerging light rays after transmission through an object such as a prism or a water drop.
Since light passes through two sides of the prism so angle of deviation are two for one angle of incidence.
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