Electromagnetic Waves- electric and magnetic field that are perpendicular to each other.
- transverse waves
- do not need a medium
- light is a EM wave
- light is a combination of a wave and particle
- photon- packet of energy/ particle that carries energy.
- waves will travel as long as there is energy to carry
- wave speed (ws) is measured in m/s
- frequency (f) is measured in hertz
- wavelength is measured in meters
- the speed of a light wave is a constant in a vacuum (symbol "c") is 300.000 km/s
- speed of a EM wave will decrease as it enters a more dense medium
- the higher frequency EM waves will have short wavelengths, low frequency will have longer wavelengths.
- gamma rays have the the shortest wavelength/ highest frequency.
- EM spectrum ( low frequency to high)- radio, infrared, visible, x-ray, gamma.
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