a light ray traveling in air enters a second medium and its speed slows to 1.71 × 10^8 meters per second. what is the absolute index of refraction of the second medium? (1) 1.00 (3) 1.75 (2) 0.570 (4) 1.94
The absolute refractive index is equal to the speed of light of the wave in air divided by the speed of light in the second medium. This means that it is equal to 3 x10^8 / 1.71 x10^8. This means the answer is 1.75
