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

Asked by  | 28th Feb, 2012, 11:29: AM

Expert Answer:

? = 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

Answered by  | 28th Feb, 2012, 11:53: AM

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