Question

A radio wave travels in a medium with refractive index 1.5. What is the speed of light in this medium if the speed of light in vacuum is \(3 \times 10^8 \, \text{m/s}\)?

• A. \(2 \times 10^8 \, \text{m/s}\)
• B. \(1.5 \times 10^8 \, \text{m/s}\)
• C. \(2.5 \times 10^8 \, \text{m/s}\)
• D. \(1.6 \times 10^8 \, \text{m/s}\)

Hint:

Use the relation \( v = \frac{c_0}{n} \) to find the speed of light in any medium.