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13 Cards in this Set
- Front
- Back
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Explain what an electromagnetic wave is.
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Electromagnetic waves are traversal waves propagating with the speed of light. They have two components an electric and a magnetic component.
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What's constructive and destructive interference?
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Constructive interference is a moment when waves are in phase, destructive is the moment when waves are out of phase.
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What does the wave theory say about the kinetic energy of photo electrons?
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It states that the kinetic energy of photo electrons is proportional to the intensity of light.
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What properties do light and all elementary particles have?
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They've all a particle and a wave-like properties.
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What properties does electromagnetic radiation have?
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Electromagnetic radiation has both wave and matter-like properties.
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What's special about the de-broigle wavelength?
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It can be assigned to any elementary particle.
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Rank the different electro magnetic spectrum from highest to lowest.
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Gamma ray - X ray - Ultra violet - Visible light - Infra red - Micro wave - Radio wave
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What is thermal radiation?
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Electromagnetic radiation emitted from objects, this spectrum depends on the temperature of the object only and is independent of the material of the object.
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It the emission of an object at a given wavelength is higher...?
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it absorbs more efficiently at that wavelength.
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How can the spectrum of emitted thermal radiation be determined?
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It can be determined with the knowledge of the spectrum of a black body radiation and the absorption coefficient.
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What does Rayleigh-Jeans law state?
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That intensity of thermal radiation increases with frequency.
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Explian Heissenberg uncertainty principle.
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The position x and the impulse Px pf an elementary particle can be determined with limited accuracy of the same wave dX x dP >|h
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What's special about bound electrons?
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They're inside molecules or atoms, they're allowed to have only certain energy levels: their energy is quantized (discrete)
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