Thursday, April 16, 2015

A ray of light is incident on the surface of a slab of refractive index 1.5 and of thickness 't' so that the ray of light has angle of refraction 600, then the time taken to cross the slab will be 
A)3t/c 
B)3t/2c 
2t/3c 
D)4t/3c

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