Question

State the two conditions under which total internal reflection occurs.

Hint:

Remember the two conditions for total internal reflection: \[ \boxed{ \text{Denser Medium} \rightarrow \text{Rarer Medium} } \] and \[ \boxed{ i>C } \] where \(C\) is the critical angle. A simple way to remember: \[ \boxed{ \text{DRC Rule} } \] \[ \text{D} \rightarrow \text{Denser to Rarer}, \qquad \text{C} \rightarrow \text{Incidence angle greater than Critical angle}. \]

Answer 1