1. Electromagnetic Spectrum

2. -is the range of all possible frequencies of electromagnetic radiation. The "electromagnetic spectrum" of an object is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object.

3. Types of Waves Radio Infrared Visible light UV X rays Gamma rays

4. Radio Waves -type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light How it is used : it is used in radio communication, broadcasting, radar, navigation systems, computer networks, and satellite communications

5. Infrared -electromagnetic radiation with a wavelength longer than that of visible light

6. Ultraviolet -electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X- rays

7. X rays They are shorter in wavelength than UV rays and longer than gamma rays.

8. Gamma Rays -is electromagnetic radiation of high frequency (very short wavelength).