In a vacuum, the speed of light is $3.0 \times 10^8\text{ m s}^{-1}$. In glass, the speed of light is $2.2 \times 10^8\text{ m s}^{-1}$. A light ray travels from a vacuum into glass, striking the surface at an angle of incidence of $40^{\circ}$. What is the angle of refraction within the glass?
- A28^{\circ}
- B29^{\circ}
- C55^{\circ}
- D61^{\circ}