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| object that absorbs and emits radiation at all frequencies |
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| observed when ultraviolet light causes electrons to be ejected from a metal plate |
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| the minimum frequency of light necessary to eject electrons from a metal |
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| energy needed to free surface electrons |
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| maximum kinetic energy of electrons ejected from the surface of a metal is inversly proportional to the _________ of the light |
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| expresses the maximum kinetic energy of an emitted electron as the difference between the total energy given by the photon and the work function |
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| One electron volt (eV) in Joules |
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| light consists of discrete bundles of energy called |
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| converts light energy into electrical energy when light of efficient frequency shines on it |
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| concluded that X-rays shot through a block of carbon were colliding with electrons in the atom and were giving up some of their energy to these electrons |
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| when a photon collides with an electron, the energy and _________ gained by the electron is exactly equal to that lost by the photon |
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| electrons ejected from the surface of a metal as a result of photol collisions |
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| electromagnetic radiation has both wave and ______ properties |
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| The french physicist deBroglie suggested that material particles have ____ properties |
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| wave properties of ____ are demonstrated when tiny particles pass through a crystal lattice and produce diffraction and interference patterns |
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| the heisenburg uncertainty principle says you cannot know the exact measurement of _____ and momentum of a particle at any one moment |
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| set of wavelengths emitted by an atom is called the _____spectrum of that atom |
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| since the allowed energy of an electron is quantized, electrons can absorb only frequencies of light energy corresponding to the equation.. |
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| in the bohr model of the atom, an electron has orbital curcumference equal to the hole number multiple of the ___________ of the electron |
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