Question
Light traveling from water to a gemstone strikes the surface at an angle of $80.0^\circ$ and has an angle of refraction of $15.2^\circ$. (a) What is the speed of light in the gemstone? (b) What is unreasonable about this result? (c) Which assumptions are unreasonable or inconsistent?
1. $6.01 \times 10^7 \textrm{ m/s}$
2. The speed of light is too slow. In diamond, which has the slowest light among materials in table 25.1, the speed of light is $1.24 \times 10^8 \textrm{ m/s}$
3. Either the angle of refraction is too small or the incident angle is too large.
Solution Video