Posted by anupma on Monday, March 5, 2012 at 6:36am.
for the same value of an angle of an incidence of reflaction in three media A,B and C are 15 degree, 25 degree and 35degree respectively. in which medium would the velocity of light be menimum

Geometry?  Writeacher, Monday, March 5, 2012 at 7:08am
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optics  drwls, Monday, March 5, 2012 at 7:40am
There is no such word as "reflaction".
The angles of incidence and reflection are always equal. If you are talking about refraction angles, they are NOT equal to incidence angles.
Your question does not make sense as you have written it.
If the angles af indidence are equal for light beams entering the three media A, B, and C, coming from air or vacuum, and the angles of refraction are 15, 25 and 35 degrees respectively, then medium A has the highest refractive index and the lowest speed of light.
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