Using the geometry we can find refraction angle Θ. Using Snell’s law we can find index of refraction of the medium By assuming index of refraction on air is one (n _{1} = 1).n _{2} = 1.9917Index of refraction of the medium is 1.9917 Using above result we can find speed of light ray inside the medium C = speed of light (Approximately 3 x 10 ^{8} m/s)Speed of light ray inside the medium is 1.506 x 10 ^{8} m/sUsing geometry we can find distance AB Distance from point A to B is 6.5 meters. Using the distance and velocity inside the medium we can find the time taken to light ray to travel from point A to B. Velocity = Distance / Time Time = Distance / Velocity Time = 6.5 m / 1.506 x 10 ^{8} m/sTime = 4.316 x 10 ^{-8} sTime to light ray to travel from point A to B is 4.316 x 10 ^{-8} seconds. |