As shown, a light ray is refracted when it travels from glass into air. What is the speed of light in the glass?
- A$2.0 \times 10^8\,\text{m s}^{-1}$
- B$2.2 \times 10^8\,\text{m s}^{-1}$
- C$2.3 \times 10^8\,\text{m s}^{-1}$
- D$2.7 \times 10^8\,\text{m s}^{-1}$