Lec-09-Chap-07-1 - CHE 131 Lecture 9, 2/10/2006 Radiation...

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CHE 131 Lecture 9, 2/10/2006 1 Radiation and Quantum Theory Lecture nine (Chapter seven) Benjamin S. Hsiao Department of Chemistry Stony Brook University Electromagnetic Radiation Radiation with both electric and magnetic components Electromagnetic Spectrum Electromagnetic Radiation Electromagnetic wave • wavelength • frequency • amplitude
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CHE 131 Lecture 9, 2/10/2006 2 Wavelength –Frequency – Amplitude
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CHE 131 Lecture 9, 2/10/2006 3 λν = c lambda The wave length in meters nu The frequency in sec -1 or Hz Speed of light 3.00 x 10 8 m/sec λν = c lambda The wave length in meters nu The frequency in sec -1 or Hz Speed of light 3.00 x 10 8 m/sec ν = c/ λ λ = c/ ν
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CHE 131 Lecture 9, 2/10/2006 4 A bright light is more intense and has greater amplitude than a dim light. The two waves shown here have the same wavelength, but different amplitudes. amplitude is represented by the height of the wave at its crest. Black Body Radiation Planck’s Quantum Theory E= h ν = hc/ λ where νλ = c E energy h Planck's constant ν →
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Lec-09-Chap-07-1 - CHE 131 Lecture 9, 2/10/2006 Radiation...

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