Presentation on theme: "What Wavelength Was That?"— Presentation transcript:
1What Wavelength Was That? Examining the Electromagnetic Spectrumwith Hands-On ActivitiesMr Hemming
2Electromagnetic Waves All travel at the speed of light, 300,000 km /s. (That’s 8 times around the earth in a second!)All can travel through empty space (a vacuum)All can be reflected or refractedThe shorter the wavelength the more dangerous they areThey all transmit energy from one place to another
4Electromagnetic Radiation The only difference between radio waves, visible light, and gamma-rays is the energy of the photons.Radio waves have photons with low energies, microwaves have a little more energy than radio waves, infrared has still more, then visible, ultraviolet, X-rays, and gamma-rays.