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101508 - Zumdahl Chapter 7 ATOMIC STRUCTURE AND PERIODICITY...

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ATOMIC STRUCTURE AND PERIODICITY Zumdahl Chapter 7
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Two areas of Physics y Classical Mechanics- Newtons’ laws works for big things y Wave/Quantum Mechanics- applies to electrical and magnetic phenomena
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Properties of Waves y Wavelength- ( λ ) the distance between the crests or troughs of waves y Frequency- ( ν ) the number of times a crest passes a certain point in a second y Velocity- (v) the speed of the peak in space y Amplitude- the height from the mid-point to the crest y Energy- of a wave, definition later
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The Nature of Waves y As the wavelength decreases the frequency increases
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The Relationship Between λ and ν y If ν crests go by in one second, then the distance traveled in one second (speed) is velocity, which is equal to the frequency ( ν ) times the wavelength ( λ ). y For light velocity = c = 3.00 x 10 8 m/s
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Determining Frequency y The wavelength of light emitted by a HeNe laser is 632.8 nm. What is the frequency of this radiation?
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The frequency of a particular color of light is 8.57 x 10 14 s -1 , what is the wavelength of this color of light?
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