The Photoelectric Effect Definition: It is the emission of electrons from a metal surface under the illumination of a suitable radiation. The photoelectric effect is the phenomenon whereby electrons are emitted from a surface (usually metallic) upon the exposure to and absorption of electromagnetic radiation‚ such as visible light‚ that is above the threshold frequency. This is because electrons cannot get enough energy to overcome their atomic bonding. The photoelectric effect furthered wave
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Nasal Cancers Tumors established within an individual’s nose can be either malignant (cancerous) or benign (non-cancerous). In all cases‚ those affected with nasal cancer frequently go through an advanced surgical procedure to confiscate the cancerous tissue/s. This is subsequently followed by a reconstructive rhinoplasty to help the person restore or improve the former shape of the nose. This is because nasal cancers often leave large defects in the nose. Proper reconstruction should aim not just
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reflection from the ionosphere. Sky waves: a radio wave that is reflected back to earth by the ionosphere or a communications satellite; permits transmission around the curve of the earth’s surface Line of propagation: is the electro-magnetic radiation or acoustic wave propagation. Electromagnetic transmission light travels in a straight line. The rays or waves can be diffracted‚ refracted‚ reflected‚ or absorbed by atmosphere and obstructions with material and generally cannot travel over the
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problem remained. There was one experiment conducted by Hertz‚ the photoelectric effect‚ which could not be explained by considering light to be a wave. Hertz observed that when certain metals are illuminated by light or other electromagnetic radiation‚ they lose electrons. Suppose we set up an electric circuit. In this circuit the negative terminal of a battery has been connected to a piece of sodium metal. The positive terminal of the battery is connected through a meter that measures electric
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Theoretical Physicist Adam Brown writes about the possibility‚ or as it turns out‚ the impossibility to mine energy from black holes. It is common knowledge that the Earth’s resources are being burned through at an alarming rate. This issue has lead to many people seeking other sources of energy. However‚ the article poses the question‚ what happens after humanity find the new form of energy and exhaust that? Some propose should the descendants of the human race seek help from the stars. Ironically
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all the light shown in the surfaces. They also radiate almost perfectly. The temperature of the black body object determine the distribution of colors or wavelengths in the admitted line. A good example of black body radiation is the heat inside a stove‚ electromagnetic radiation light and heat exist in a form of standing waves‚ waves like the vibration of a guitar string is attached in both ends. The ends of the standing waves do not move‚ the are attached to the side of the stove‚ and many waves
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The cancer i chose to write about was bladder cancer. I’m not really sure why i chose this cancer but i find it cool that you can get cancer in all different places. Nobody knows the main cause of bladder cancer. Some things that may cause cancer is chronic bladder inflammation‚ chemical exposure or smoking. I find it very weird that smoking could affect your bladder or even drinking caffeine can. Cystoscopy is the main diagnostic test for bladder cancer‚ you can also get a bladder biopsy which
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AVT 123 (Aircraft Communications/SATCOM) Communication The sending of a message via medium to a receiver Feedback – a response or one that sets such a process in motion; a reply or reaction to a stimulus. Hindrances to communication Noise Language Barrier Weather Surroundings Language/Sound Barrier Media Failure Telecommunication TELE – Greek word…… at a distance The sending of a message through a medium to a receiver at a distance; involved the use of machines
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an extremely broad range‚ from radio waves with wavelengths of a meter or more‚ down to x-rays with wavelengths of less than a billionth of a meter. Optical radiation lies between radio waves and x-rays on the spectrum‚ exhibiting a unique mix of ray‚ wave‚ and quantum properties. At x-ray and shorter wavelengths‚ electromagnetic radiation tends to be quite particle like in its behavior‚ whereas toward the long wavelength end of the spectrum the behavior is mostly wavelike. The visible portion
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Flame Tests Atomic Emission and Electron Energy Levels AES‚ or atomic emission spectroscopy‚ is a method which chemically analyzes the particular wavelength of a sample element to identify and determine the abundance of this certain element. The wavelength of the atomic spectral line unveils the identity of the element while the emitted light intensity is proportional to the number of atoms in the element. The flame test is also a very effective way to identify an individual element. The color
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