Question

Based on their refractive index, sort the speed of light in ascending order.

• A. Diamond n = 2.41
• B. Ruby n = 1.76
• C. Quartz n = 1.54
• D. Kerosene n =1.41
• E. water n = 1.33

Answer 1

With the increase in refractive index of a medium, the speed of light decreases. From the above mentioned options, water has the least refractive index, which implies that light travels the fastest in water and the slowest in diamond.