Electromagnetic waves used in medicine to destroy cancer cells (A) radio waves (B) infrared rays (C) gamma rays (D) ultraviolet rays

The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. It is divided into several sections, including radio waves, microwaves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays. Each section has unique properties and uses in various fields.

Now let's analyze the given options and their applications in medicine: (A) Radio waves have low frequencies and long wavelengths. They are mostly used in communication systems and are not used to destroy cancer cells. (B) Infrared rays have slightly higher frequencies and shorter wavelengths than radio waves. These rays are used in heat therapy and for taking thermal images, but they do not destroy cancer cells. (C) Gamma rays have high frequencies and very short wavelengths. These rays have high energy and can penetrate deep into the body. In medicine, their high-energy nature allows them to kill cancer cells without damaging the surrounding tissues. (D) Ultraviolet rays have frequencies between visible light and X-rays. These rays are used for sterilization and disinfection, but they are not used to destroy cancer cells.

Based on our analysis, we can conclude that (C) gamma rays are the type of electromagnetic waves used in medicine to destroy cancer cells. The high-energy nature of gamma rays enables them to target and kill cancer cells effectively without causing significant damage to surrounding tissues.