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The Electromagnetic spectrum
Transcript of The Electromagnetic spectrum
Radiation X-ray Gamma Ray Bibliography Visible light waves are the only waves in the electromagnetic spectrum that we can see. The waves are seen as colors of the rainbow and each color has a unique wavelength. Cones in our eyes receive theses tiny waves. The Sun is a natural source for these waves and we see the color of an object by seeing the color of the light reflected off of it. All other colors are absorbed. Ultraviolet Waves: Waves with wavelengths smaller than those of visible light. Ultraviolet (UV) waves have shorter wavelengths than visible light. These waves are invisible to humans, but some organisms such as bees, can see them! Scientists divided the UV part of the spectrum into 3 parts: near, far, and extreme. These parts are divided by the energy and wavelength of the UV waves. Our Sun emits all different wavelengths of the electromagnetic spectrum, but UV waves are the ones that cause sunburns. Near UV Far UV Extreme UV The near ultraviolet (NUV) is the light that is closest to our visible light spectrum. Extreme Ultraviolet (EUV) is closest to x-rays and are the most energetic UV waves. Far UV (FUV) are in-between EUV and NUV and are the least explored of all UV waves X-ray: electromagnetic waves with wavelengths just shorter than those of ultraviolet waves. As waves of light decrease, they increase in energy. X rays have a smaller wavelength, therefore an increase in energy. X-rays have very small wavelengths, so they have a lot of energy. X-rays act more like a particle than a wave. X-ray detectors actually collect photons of x-ray light. Their Discovery X-rays were discovered in 1895 by Wilhelm Conrad Roentgen who was a German scientist studying on pipes. Gamma Ray: electromagnetic waves with the shortest wave length and highest frequencies. Gamma rays have the smallest wavelength, and most energy of any wave in the electromagnetic spectrum. These waves are generated by radioactive atoms. They can also kill living cells. They are used in medication to kill cancer cells which is a good thing. Gamma-rays travel to us across great distances of the universe, only to be absorbed by the Earth's atmosphere. Different wavelengths of light penetrate the Earth's atmosphere to different depths. Instruments on high-altitude balloons and satellites such as the Compton Observatory provide our only view of the gamma-ray sky. http://science.hq.nasa.gov/kids/imagers/ems/radio.html
Georgia Physical Science Prentice Hall Science Explorer Take Out A Sheet Of Paper To Take Notes As Necessary Bingo Rules: Your table is your team. When you get your bingo cards you will number it 1-24 without repeating any #. Raise your hand when your team has the answer and if you get it right you get the bingo slot on your card.