A beam of light travelling at a velocity of V m/s is incident at an an – McqOptions

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1.	A beam of light travelling at a velocity of V m/s is incident at an angle 45 on a glass. Slab of refractive index 1.5. What is the velocity of the beam of light inside the slab?
A.	V
B.	2V / 3
C.	V / 2
D.	None of these
Answer» C. V / 2

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