I. Introduction A. Introduce Yourself B. Introduce Group Members C. Introduce Topic II. Talk about Light Waves A. Different forms of light waves B. Different part of light waves C. Construct a brief drawing of a light wave III. Spectrometer A. Explain purchase of spectrometer B. Explain various colors of spectrum and its relationship to light waves. C. Show audience spectrometer and demonstration D. Cardboard diagram IV. Introduction of transmitter A. Tell the purpose of a transmitter B. Put transmittter into action C. Identify different parts of transmitter V. Closing A. Opinion of project B. Any questions
There are also waves that are visible to the human eye. light waves are visible and are made up of many colors. The reason why is because of the wave line. This process is called in phase. It is when two or more waves are in phase they expand and give off white light. When two or more waves are out of phase they cancel out and give off darkness.
A great example is on the board. You have a classic wave. The highest point of the wave is called a peak, the lowest point is called a trough, and the height of the wave is called amplitude. Different parts of the wave have different degrees. When a wave is 180 degrees out of phase, the wave will destruct and cancel out to give off darkness, but when the wake is 90 degrees in phase it will construct and give off white light.
What actually happens when you use a spectrometer is that light enters the spectrograph through a narrow slit and then is collimated (made into a beam of parallel rays) by a lens. Different wave lengths of light then leave the prism (or grating) in different directions due to dispersion on deffraction. A second lens placed behind the prism then forms an image of the spectrum on the photo graphic plate due to dispersion, the light of different wave lengths enter the second lens from slightly different directions and consequently the lens produces different images of the slit for each different wavelength.
We have briefly informed you what we've learned about lightwaves, spectrometers, and transmitters. It turned out to be a great learning experience and very exciting. We hope to have this experience again.
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