particles of light http://www.sciencephoto.com/image/227396/530wm/H4140126-Newton_s_optics-SPL.jpg • 5. Christiaan Huygens (1629-1695) Wave Theory (1678) Light is a wave that can transfer energy without transferring matter Light waves have varying wavelengths‚ frequencies‚ speeds and amplitude • 6. Wave Theory (1678) Follows laws of reflection and refraction Explains diffraction: the effect of waves when encountering an obstacle Constructive and destructive interference http://www.sciencephoto
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Paper Electron diffraction through a graphite film. Mark Raskin Skidmore College (11/14/14) Abstract: In this paper‚ the wave-like properties of electrons are discussed. We are trying to measure the inter-atomic spacing (d) between the graphite atoms‚ which we are accelerating electrons through. As the electrons pass through the graphite‚ an interference pattern emerges on the screen in front of the gun. The interference pattern shows up as a circle within a circle‚ each of which represents
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interference‚ as in Young’s slits‚ but with a large number of sources‚ the process be labelled diffraction. While diffraction occurs whenever propagating waves encounter such changes‚ its effects are generally most pronounced for waves whose wavelength is roughly similar to the dimensions of the diffracting objects. If the obstructing object provides multiple‚ closely spaced openings‚ a complex pattern of varying intensity can result. This is due to the superposition‚ or interference‚ of different
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Quantum mechanics is one of the major revolutions in 20th century Physics. It is probably the closest science has come to a fundamental description of the underlying nature of reality. And yet it is totally bizarre—it flies in the face of all our intuition and common sense. It sounds more like science fiction‚ or a poorly written fantasy‚ than notions which serious scientists would entertain. In this paper‚ we attempt to explain some of these fantastic notions for the layman. This paper comes with
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Frequency and Volume of Sound Waves Exp 11.1 Physics Lab Partners: 1/28/12 Object: To see how wave length‚ speed‚ and temperature affect frequency Supplies: * 2 six inch pieces of copper pipe and 1 four inch piece * Freezer * Hot tap water * Bowl * Paper towels Procedure: 1. Hold one of the six inch pieces of pipe in hand and plug the bottom with finger 2. Blow into the pipe until you find the right angle to create a tone 3. Vary the force with which you
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Scattering. Although the property was originally applied to the blue sky‚ it was eventually connected to aerogels. It turns out‚ light is not scattered evenly by the aerogel. Instead‚ shorter wavelengths are scattered more than the longer ones. As a result‚ more blue light is scattered compared to the longer wavelengths of visible light. With this conclusion‚ the ambiguous nature of the physical existence of aerogels became
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3. It is diffracted when grazing over an obstacle. A small shadow area created when some of the energy is redirected. 4. The beam can be reflected from relatively smooth terrain and water surfaces. The criterion of smoothness depends on the wavelength of the signal. 5. At 6 to 8GHz frequency band‚ rain attenuation is not a problem. But for frequencies 11GHz and above‚ rain attenuation is very serious. The amount of attenuation depends upon the rate of rainfall‚ the size of the drops and length
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received analog signal‚ such as through a microphone‚ and digitize it for use by the computer. A higher sampling rate provides a better quality reproduction than a lower sampling rate. 12. Electromagnetic Wave: refers to the complete range of wavelengths of
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Bibliography- World Wide Web- 1. Laws. The Benefits of Fertiliser [Internet]. Available from: http://www.agrium.com/about_us/benefits_of_fertiliser.jsp (Accessed 7th of October‚ 2013). 2. Environmental benefits of using fertilisers [Internet]. Available from: http://www.agroservicesinternational.com/Environment/Benefits.html (Accessed 7th of October‚ 2013). 3. (2002). Burke ’s Backyard > Fact Sheets > Pansies [Internet]. Available from: http://www.burkesbackyard.com.au/2002/archives
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Nature of Waves Vibrations or oscillations are closely related to waves. Waves are created whenever objects vibrate or oscillation. Periodic Motion * A repeated motion that occurs back and forth over the same path at regular intervals. Examples: * A Child on a swing * A wrecking ball swaying to and fro * A swinging pendulum of a grandfather clock Simple Harmonic Motion (SHM) * Is a type of motion along a straight path in which the acceleration is proportional to the displacement
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