sbc 200 Lecture Notes - Lecture 14: Black-Body Radiation, Atomic Orbital, Bohr Model
25 Nov 2016
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Document Summary
Visible light is a type of electromagnetic radiation. The wave properties of electromagnetic radiation are described by three variables: frequency ( ), cycles per second. Wavelength ( ), the distance a wave travels in one cycle. Amplitude, the height of a wave crest or depth of a trough. The speed of light is a constant: c = x = 3. 00 x 108 m/s in a vacuum. A solid object emits visible light when it is heated to about 1000 k. this is called blackbody radiation. The color (and the intensity ) of the light changes as the temperature changes. Color is related to wavelength and frequency, while temperature is related to energy. Energy is therefore related to frequency and wavelength: E = energy n is a positive integer h is planck"s constant. Any object (including atoms) can emit or absorb only certain quantities of energy. Energy is quantized; it occurs in fixed quantities, rather than being continuous.
