The velocity of light in air is 3 x 1010 cm/sec. Its velocity in glass with a refractive index of 1.5 will be: Leave a Comment / GK Mcqs A. 4.5 x 100 cm/sec B. 3 x 10 cm/sec C. 2 x 10^10 cm/sec D. 9 x 100 cm/sec