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Define critical angle for a given medium...

Define critical angle for a given medium

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**Step-by-Step Solution:** 1. **Understanding Refraction**: Refraction is the bending of light as it passes from one medium to another due to a change in its speed. When light travels from a denser medium (like glass) to a rarer medium (like air), it bends away from the normal. 2. **Defining the Critical Angle**: The critical angle is defined as the angle of incidence in the denser medium at which the angle of refraction in the rarer medium is exactly 90 degrees. This means that the refracted ray travels along the boundary between the two media. 3. **Mathematical Representation**: The critical angle (C) can be mathematically represented using Snell's Law, which states: \[ ...
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