Em spectrum

Em spectrum

1. continuous range of wavelengths,

2. types of radiation have different uses and dangers

3. depending on wavelength and frequency

4. radio waves

   • microwaves
     • infrared
       • visible light
         • ultraviolet
           • x-rays
             • gamma rays

5. all waves travel at the same speed in a free space

   • speed of light- 300,000,000 metres per second