Question 21A light wave of frequency 5x1014 Hz moves through water which has a refractive index of 4/3. Calculate the wave length in water if the velocity of light in air is 3 x 108m/s. A.4.5 × 10-7mB.6.0 × 10-7mC.1.7 × 106mD.2.2 × 106mObjective Show full explanation