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Grade:

                        

Actually this is ray optics refraction problem. Explain it sir.

2 years ago

Answers : (1)

Arun
24742 Points
							
Dear Raju
 
 
 
when total internal reflection just takes place from lateral surface
i = 60 degree = C
 
 
sin 60 = sin C = 1/ mu
 
mu = 2/sqrt(3)
 
time taken by lght to taverse some distance in a medium t = mu * x / c
 
t = 2 / sqrt(3)   * 10^3 / 3  *10^8
 
t = 3.85 m sec
 
2 years ago
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