Q1 of 20 Page 65

If a ray of light is travelling from a denser medium to rarer medium and if the angle of incidence is greater than the critical angle, then the following takes place

The Critical angle is the largest angle of incidence for which refraction can still occur. For any angle of incidence greater than the critical angle, the light will undergo total internal reflection. And will obey the laws of reflection of light. The figure below illustrates it in more detail.


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