Question

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

• A. Glass = 1.50
• B. Diamond = 2.41
• C. Water = 1.33
• D. Kerosene = 1.41
• E. Ruby = 1.76

Answer 1

With the increase in refractive index of a medium, the speed of light travelling within it 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.