Question

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

• A. Diamond = 2.41
• B. Ruby = 1.76
• C. Glass = 1.5
• D. Kerosene = 1.41
• E. Water = 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.