Question 11 Mark
What is critical angle ? Write down its necessary conditions.
Answer
View full question & 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.