1. Electromagnetic Radiation

2. What is electromagnetic radiation ? Transverse waves that transfer energy by radiation Transverse waves that transfer energy by radiation Examples: Gamma Rays, Visible Light, Infrared, Ultraviolet, Radio Waves, X-rays and Microwaves Examples: Gamma Rays, Visible Light, Infrared, Ultraviolet, Radio Waves, X-rays and Microwaves

3. How to Interpret the ElectroMagnetic Spectrum As the wavelength increases the frequency decreases Increased frequency means more energy

4. Radio Waves Electromagnetic radiation which has the lowest frequency, the longest wavelength, and is produced by charged particles moving back and forth; the atmosphere of the Earth is transparent to radio waves with wavelengths from a few millimeters to about twenty meters. Electromagnetic radiation which has the lowest frequency, the longest wavelength, and is produced by charged particles moving back and forth; the atmosphere of the Earth is transparent to radio waves with wavelengths from a few millimeters to about twenty meters. Electromagnetic frequencywavelength Electromagnetic frequencywavelength

5. Microwaves Electromagnetic radiation which has a longer wavelength (between 1 mm and 30 cm) than visible light. Microwaves can be used to study the Universe, communicate with satellites in Earth orbit, and cook popcorn. Electromagnetic radiation which has a longer wavelength (between 1 mm and 30 cm) than visible light. Microwaves can be used to study the Universe, communicate with satellites in Earth orbit, and cook popcorn. Electromagnetic wavelength Electromagnetic wavelength

6. Infrared We often think of this as being the same thing as 'heat', because it makes our skin feel warm. In space, IR light maps the dust between stars. http://gallery.spitzer.caltech.edu/Imagegallery/image.php?image_na me=ssc2003-06v3 We often think of this as being the same thing as 'heat', because it makes our skin feel warm. In space, IR light maps the dust between stars. http://gallery.spitzer.caltech.edu/Imagegallery/image.php?image_na me=ssc2003-06v3dust http://gallery.spitzer.caltech.edu/Imagegallery/image.php?image_na me=ssc2003-06v3dust http://gallery.spitzer.caltech.edu/Imagegallery/image.php?image_na me=ssc2003-06v3

7. Visible Light Electromagnetic radiation at wavelengths which the human eye can see. We perceive this radiation as colors ranging from red (longer wavelengths; ~ 700 nanometers) to violet (shorter wavelengths; ~400 nanometers.) Electromagnetic radiation at wavelengths which the human eye can see. We perceive this radiation as colors ranging from red (longer wavelengths; ~ 700 nanometers) to violet (shorter wavelengths; ~400 nanometers.) Electromagneticwavelengths Electromagneticwavelengths

8. Why should you not buy red scuba equipment?

9. Ultraviolet or UV Electromagnetic radiation at wavelengths shorter than the violet end of visible light; the atmosphere of the Earth effectively blocks the transmission of most ultraviolet light. Electromagnetic radiation at wavelengths shorter than the violet end of visible light; the atmosphere of the Earth effectively blocks the transmission of most ultraviolet light. Electromagneticwavelengths Electromagneticwavelengths

10. No Tan Is A Good Tan!!!!

11. X-Ray Electromagnetic radiation of very short wavelength and very high-energy; X-rays have shorter wavelengths than ultraviolet light but longer wavelengths than gamma rays. http://chandra.harvard.edu/photo/2005/gctr_bin/bh_swarm_sm.mov Electromagnetic radiation of very short wavelength and very high-energy; X-rays have shorter wavelengths than ultraviolet light but longer wavelengths than gamma rays. http://chandra.harvard.edu/photo/2005/gctr_bin/bh_swarm_sm.mov Electromagnetic wavelength Electromagnetic wavelength

12. Gamma Rays The highest energy, shortest wavelength electromagnetic radiations. Usually, they are thought of as any photons having energies greater than about 100 keV. (It's "gamma-ray" when used as an adjective.) The highest energy, shortest wavelength electromagnetic radiations. Usually, they are thought of as any photons having energies greater than about 100 keV. (It's "gamma-ray" when used as an adjective.)wavelength electromagneticphotonswavelength electromagneticphotons