1. LASIK (Laser-Assisted in Situ Keratomileusis):
2. Cell phones:
Thus, the correct answer is that LASIK uses ultraviolet rays, and cell phones use radio waves.
\[ \boxed{\text{B) Ultraviolet rays and radio waves}} \]
Kepler's second law (law of areas) of planetary motion leads to law of conservation of
Kepler's second law (law of areas) of planetary motion leads to law of conservation of