Question
What is critical angle ? Write down its necessary conditions.
✓
Answer
Critical angle : It is the angle of incidence for which he angle of refraction is 90°. When a ray of light is incident from denser to rarer medium.
$\mu = \frac{1}{\sin C}$
Conditions : The light should be travelling from denser to rarer medium.
$\mu = \frac{1}{\sin C}$
Conditions : The light should be travelling from denser to rarer medium.
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