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Chemistry Study Notes Electrons And Light Essay

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Electric and magnetic components to every light wave-speed of light is always constant-speed of light = wavelength x frequency (c = λv)Particle Nature of Light-matter can gain or lose energy only in small, specific amounts called quanta-a quantum is the minimum amount of energy that can be gained or lost by an atom-Equantum = hv-h is Plancks constant and v is frequency-energy and wavelength are inversely related-for a given frequency matter can emit or absorb energy only in whole-number multiples of h-cant use the wave description of light to explain this phenomenon (light energy is not wave like, but particle-like of specific sizes)-Photoelectric effect: when light is shone on a metal, electrons may be emitted by the metal-electrons absorb light energy which provides enough energy for theelectrons to leave the atom-the faster the electrons are moving, the more energy was transferredfrom the light-lower frequency (v) number of waves that pass through a point in space per second, s-1, 1/s, Hz --> longer wavelength (λ) meters, centimeters → lower energy-shorter wavelength --> higher frequency-if no electrons ejected --> minimum threshold energy required to eject an electron from the metal (light did not provide sufficient energy)-beam of light is a stream of tiny particles called phot...

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