Electromagnetic Waves

• Vacuum• Force fields

Photons

• Definition• Electrons• Energy levels• Electrons absorb energy

Photons (cont.)

• “Excited & unstable”• Photons released when electrons return• Photon energy 1. Energy level jump 2. Types of light

Properties of Light• Transverse wave/photons• Wavelength• Frequency/energy• Speed of light 1. c = 300 million m/s 2. Medium 3. Types of light 4. Calculation of speed of light???

vacuumgasesliquidssolids