(a) The refractive index of glass is `1.5`. What is the speed of light in glass ? (Speed of light in vaccum is `3 xx 10^(8) ms^(-1)`).
(b) Is the speed of light in glass independent of colour of light ? If not, which of the two colours, red and violet travels slower in a glass prism ?

Explanation

To solve the given question step by step, we will break it down into two parts as specified.

### Part (a): Speed of Light in Glass

1. **Understanding the Refractive Index**: The refractive index (μ) of a medium is defined as the ratio of the speed of light in vacuum (C) to the speed of light in that medium (V). The formula is given by:
\[ \mu = \frac{C}{V} \]
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