Diamonds do not shine in dark. Explain.

Explanation

### Step-by-Step Solution:

1. **Understanding Diamond's Shine**:
- Diamonds do not produce their own light. They are transparent crystals that rely on external light sources to shine.

2. **Role of Light**:
- When light enters a diamond, it undergoes multiple internal reflections due to the diamond's cut and structure. This phenomenon is known as Total Internal Reflection (TIR).

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