Question

In which of the following cases, is total internal reflection not possible ?

• A. A ray incident from water to glass
• B. A ray incident from glass to water
• C. A ray incident from glass to air
• D. A ray incident from water to air

Answer 1

The correct option is A A ray incident from water to glass

$Answer:-$ A option

${\mu }_w\left(water\right)=1.33$ ${\mu }_g\left(glass\right)=1.5$

since total internal reflection occours only when a ray travel from denser medium(more $\mu$ ) to rarer medium(less $\mu$),since in option A light is travelling from water to glass so no total internal reflection possible.