A ray of light is travelling normally through a glass sheet. Calculate the time taken by the light to travel if the thickness of the glass sheet is 2 mm.
Take, `mu_("glass") = 1.5`

Explanation

To solve the problem of calculating the time taken by light to travel through a glass sheet of thickness 2 mm, we can follow these steps:

### Step 1: Understand the given data
- Thickness of the glass sheet (T) = 2 mm
- Refractive index of glass (μ) = 1.5
- Speed of light in vacuum (c) = \(3 \times 10^8\) m/s

### Step 2: Convert the thickness from mm to meters
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