Light travels from air into a glass block with refractive index $1.5$, as illustrated. What is the angle of refraction in the glass and what is the critical angle?
- Aangle of refraction $34^{\circ}$, critical angle $42^{\circ}$
- Bangle of refraction $34^{\circ}$, critical angle $60^{\circ}$
- Cangle of refraction $38^{\circ}$, critical angle $42^{\circ}$
- Dangle of refraction $38^{\circ}$, critical angle $60^{\circ}$