Presentation on theme: "What Wavelength Was That?"— Presentation transcript:
1 What Wavelength Was That? Examining the Electromagnetic Spectrumwith Hands-On ActivitiesMr Hemming
2 Electromagnetic 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
4 Electromagnetic 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.