Question
Tue February 28, 2012 By:
 

A ray of light incident on an equilateral prism shows minimum deviation of 30 degrees. Calculate the speed of light through the glass prism.

Expert Reply
Tue February 28, 2012
? = speed of light in air/ speed of light in glass
 
= Sin( ( 60+30)/2) {Sin(60/2)}
simplyfying, we get
 
vg = 2.12X10^8 m/s
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