Question

The speed of light in benzene is 2×10⁸ m/s. Its refractive index is (speed of light in vacuum = 3x10⁸m/s)

• A. 0.66
• B. 1
• C. 1.5
• D. 2

Answer 1

The Correct Option is C

Correct answer: 1.5 

The refractive index \( n \) is calculated using the formula: \[ n = \frac{c}{v} \] where: - \( c = 3 \times 10^8 \, \text{m/s} \) (speed of light in vacuum) - \( v = 2 \times 10^8 \, \text{m/s} \) (speed of light in benzene) \[ n = \frac{3 \times 10^8}{2 \times 10^8} = 1.5 \] Hence, the correct answer is 1.5.