An air bubble trapped inside a rectangular glass slab (cuboid) appear at 2 cm from one side and at 3 cm from the other opposite side. If the refractive index of glass is 1.5, what is the actual width of the glass slab?

Explanation

To find the actual width of the glass slab with an air bubble trapped inside, we will use the concept of apparent depth and the refractive index of the medium. Here's a step-by-step solution:

### Step 1: Understanding Apparent Depth
The problem states that the air bubble appears at 2 cm from one side and at 3 cm from the other side of the glass slab. These distances represent the apparent depths (H1 and H2) of the bubble as viewed from each side of the slab.

- **H1 (Apparent Depth from one side)** = 2 cm
- **H2 (Apparent Depth from the opposite side)** = 3 cm

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