The diagram shows a ray of light travelling in air and striking a glass block. Part of the light is refracted and part is reflected. The angles $p$ and $q$ are labelled on the diagram. Which row identifies the angle of incidence and says whether total internal reflection takes place?
- Aangle $p$, no
- Bangle $p$, yes
- Cangle $q$, no
- Dangle $q$, yes