Question

The speed of light in vacuum is c. The speed of light in a medium of refractive index $\frac 43$ is

• A. $\frac c3$
• B. $\frac c4$
• C. $\frac {4c}{3}$
• D. $\frac {3c}{4}$

Answer 1

Answer: (D)

$\frac {3c}{4}$

Answer 2

The correct option is (D): $\frac {3c}{4}$.