Which one of the following is not associated with the total internal reflection?

Options

A. The mirage formation
B. optical fibre communication
C. Te glittering of diamond
D. Dispersion of light

Explanation

To determine which of the given options is not associated with total internal reflection, we will analyze each option step by step.

### Step 1: Understand Total Internal Reflection
Total internal reflection occurs when a light wave hits a boundary between two media at an angle greater than the critical angle, leading to the light being completely reflected back into the medium from which it came. This phenomenon is crucial in various optical applications.

### Step 2: Analyze Each Option

1. **Mirage Formation**
- A mirage is an optical phenomenon that occurs due to the refraction of light rays passing through air layers of different temperatures. It is associated with the bending of light rather than total internal reflection. Thus, while it involves light behavior, it does not directly involve total internal reflection.

2. **Optical Fiber**
- Optical fibers utilize total internal reflection to transmit light signals over long distances. Light entering the fiber at a suitable angle is reflected internally, allowing for efficient transmission of information. This option is associated with total internal reflection.

3. **Glittering Diamond**
- Diamonds exhibit a high degree of brilliance due to total internal reflection. When light enters a diamond, it reflects multiple times within the stone before exiting, contributing to its sparkle. This option is also associated with total internal reflection.

4. **Dispersion of Light**
- Dispersion occurs when light passes through a prism, separating it into its constituent colors. This process involves refraction rather than reflection. Although reflection may occur at the surfaces of the prism, dispersion itself does not rely on total internal reflection.

### Step 3: Conclusion
From the analysis, the option that is **not associated with total internal reflection** is **Mirage Formation**.

### Final Answer
The correct answer is: **Mirage Formation**.

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