Photocopier photoelectric effect
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Jan 29, 2013 · The Photoelectric Effect is the emission of electrons from a metal due to light of a suitable frequency falling upon it. Sound track in film, photography, counters, photocell, burglar alarm, automatic doors, etc.
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The other experiments, namely the photoelectric effect and line spectra, are covered in the Particles and Waves unit. Max Planck Albert Einstein Niels Bohr. Figure 2.2 Founders of old quantum theory. The key players in putting forward solutions were Max Planck (1858–1947), Albert Einstein (1879–1955) and Niels Bohr (1885–1962).
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Photoelectric effect. E = hf. Threshold frequency = hfo. Einstein's photoelectric law. hf = + ½ mv2. X-rays. X-ray tube. X-ray properties. Nuclear Physics. Rutherford's gold foil experiment. Bohr model of the atom. Emission line spectra. hf = E2 - E1. Isotopes. Radioactivity. Uses of radioactivity Geiger-Muller tube. Law of radioactive decay ...
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Give one application of the photoelectric effect. 2005 Question 12 (d) [Higher Level] One hundred years ago, Albert Einstein explained the photoelectric effect. What is the photoelectric effect? Write down an expression for Einstein’s photoelectric law. Summarise Einstein’s explanation of the photoelectric effect.
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Photon: Posited particle to explain photoelectric effect, and other phenomena relating to light. Quantum of light of electromagnetic radiation of energy, E = HV, where H = Planck’s Constant, (6.626 x10 to -34th Joules-seconds). No zero rest mass, but has momentum HV/C, where C is the speed of light, and V is frequency in cycles per second.
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The single greatest source of debate among physicists in the early decades of the last century was to do with the nature of light. This concept has probably caused more angst than any other to scientists and philosophers right back to the ancient Greeks.To take just one aspect; we can prove that light is a particle (via the photoelectric effect) and we can prove that light is a wave (via ...
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Selenium has been found to disrupt zinc finger proteins that are mostly transcriptional regulators, resulting in damage to DNA signalling, repair and transcription (Blessing et al., 2004). Environmental waste sources of selenium are products of the electronic, photoelectric, photocopier, glass, and rubber industries (US Geological Survey, 2004).
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Jan 18, 2013 · The single greatest source of debate among physicists in the early decades of the last century was to do with the nature of light. This concept has probably caused more angst than any other to scientists and philosophers right back to the ancient Greeks.To take just one aspect; we can prove that light is a particle (via the photoelectric effect) and we can prove that light is a wave (via ...
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