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Spectrum Dense Objects
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Emit a continuous spectrum that depends only on the temperature and size of the object. Shows the amount (intensity or brightness or number photons) of light at different wavelengths.
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Continuous Spectrum Continuous Spectrum
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Spans all visible wavelengths without interruption. The spectrum of a common incandescent light bulb
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Emission Line Spectrum Absorption Line Spectrum
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A cloud of gas between us and a light bulb can absorb light of specific wavelengths. A thin or low-density cloud of gas emits light only at specific wavelengths that depend on its composition and temperature.
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Chemical Fingerprint Temperature
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Determines the shape of an object’s thermal radiation spectrum. Each type of atom has a unique set of energy levels; each transition corresponds to a unique photon energy, frequency, and wavelength.
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Size Properties of Thermal Radiation
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1. Hotter objects emit more light at all frequencies per unit area 2. Hotter objects emit Increases the total amount of thermal radiation emitted by an object at all wavelengths by the same amount.
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photons with higher average energy
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Doppler Effect Blueshift
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us. Tells us how fast an
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This note was uploaded on 08/30/2011 for the course AST 2002 taught by Professor Britt during the Spring '08 term at University of Central Florida.

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Exam2 - Flashcards - The flashcards are formatted for...

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