The diagram illustrates a ray of light travelling through glass and striking the boundary between the glass and air. What occurs if the angle of incidence is increased to a value 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.