The diagram represents a ray of light travelling in glass and striking the boundary between the glass and air. What occurs if the angle of incidence is increased to be greater than the critical angle for the glass?
- AThe angle of refraction becomes equal to $90^\circ$.
- BThere is a refracted ray and a ray reflected inside the glass.
- CThere is a refracted ray only.
- DThere is only a ray reflected inside the glass.