A cell phone is a portable phone that uses the cellular network to receive and make calls and send and receive text messages. Cell phones emit signals via radio waves made up of radio frequency energy; it is a form of electromagnetic radiation. Electromagnetic radiation is energy that emits wave-like behavior as it travels through space. Examples of electromagnetic radiation are microwaves, X-rays and visible light. The electromagnetic spectrum consists of most of the colors we normally see in the world in a rainbow such as red, orange, green, yellow, blue, indigo and violet. When we put our cell phones in our pockets or anywhere near our body, we let a lot of radiation into our body, and this radiation can cause risks to human health. The microwave we use to heat food and the cell phones we use are all part of the electromagnetic spectrum. The electromagnetic spectrum is the set of all possible frequencies of electromagnetic radiation. Gamma rays are a type of radiation that has a very high energy beam that i...