A student produces four diagrams showing light travelling from air into a glass block and then returning to the air. The critical angle for the glass is $42^\circ$. Which diagram shows the light path through the glass block incorrectly?
Physics 0625 · IGCSE · Light
A student produces four diagrams showing light travelling from air into a glass block and then returning to the air. The critical angle for the glass is $42^\circ$. Which diagram shows the light path through the glass block incorrectly?