Question

If A and B are the speed of light in a medium and refractive index of that medium respectively, then

• A. A is low when B is high B
• B. A is high when B is high
• C. A is independent of B
• D. None of these

Answer 1

The Correct Option is A

The refractive index \( B \) of a medium is related to the speed of light in the medium (\( A \)) and the speed of light in vacuum (\( c \)) by the formula: \[ B = \frac{c}{A}. \] From this equation, we can see that when the refractive index \( B \) is high, the speed of light \( A \) will be low, and vice versa. Thus, \( A \) is low when \( B \) is high.

Therefore, the correct answer is (A): \( A \) is low when \( B \) is high.