An EMR source can be very dangerous to human beings, and sometimes there is a risk of losing a life. An example of a EMR source is UV (ultraviolet) light. UV light comes from the sun. The sun gives off two types of harmful waves: long wave UV-A and short wave UV-B. UV-A light causes aging of the skin while UV-B causes sunburns and plays a key role in skin cancer. The UV photons contained in the sunlight are shorter in wavelength and higher in energy than visible light which means that UV photons have high energy. Although humans can not see the UV photons since they fall out of the visible spectrum, they can harm humans by causing a sunburn. A sunburn is produced over a short term from the damage caused from the UV light. The damage is caused
