*Remember the order of electromagnetic spectrum.
http://www.kollewin.com/blog/electromagnetic-spectrum/
Properties of Electromagnetic Spectrum
http://en.wikipedia.org/wiki/File:EM_Spectrum_Properties_edit.svg
- Wavelength - decreasing from left to right; Frequency - increasing from left to right
- Electromagnetic waves, unlike mechanical waves, do not require a medium to travel.
- All electromagnetic waves travel in vacuum at the same speed: 300,000,000 m/s.
- Electromagnetic waves are two dimensional transverse waves which are perpendicular to each other (polarisation).
Uses & Harms of Electromagnetic Waves
*green = uses; red = harms
