Electromagnetic Waves

1. Carried by oscillating electrical and magnetic fields.

2. Direction of wave propagation perpendicular to both fields

3. Speed in vacuum=3x10^8

3.1. Wavelength x frequency=3x10^8

4. Ultraviolet

4.1. Wavelength=400nm-10nm

4.2. Very dangerous

4.3. Uses

4.3.1. Disinfection

5. Infra-red waves

5.1. Wavelength=1mm-700nm

5.2. Radiates from the sun

5.3. Uses

5.3.1. Telescopes

5.3.2. Remote controllers

6. Gamma Ray

6.1. Wavelength(<10 picometer)

6.2. Highest energy

6.3. Can kill living cells

6.4. Uses

6.4.1. Treating cancer

7. X-ray

7.1. Wavelength=0.01nm-10nm

7.2. Can pass through many materials

7.3. Highly energetic form of light

7.4. Uses

7.4.1. Medicine

8. Visible light

8.1. Very small part of the spectrum

8.2. Wavelength=390nm to 700nm

8.3. Uses

8.3.1. Seeing

9. Radiowaves

9.1. Uses

9.1.1. Radio

9.1.2. Television

9.1.3. Walkie talkies

9.2. Longest wavelength(>1m)

9.3. Smallest electromagnetic wave

10. Microwaves

10.1. Wavelength=1mm-1m

10.2. Rotates water molecules

10.3. Uses

10.3.1. Microwave ovens

10.3.2. Communication