Quantum mechanics

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15 Terms

1
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Wien’s law

λmaxT = 2.9mm K

2
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The issue of the Rayleigh-Jeans law

Predicts a limitless increase in energy density aka the ultraviolet catastrophe

3
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Planck’s proposal

oscillators are only excited if they can acquire an energy of at least hv which is too large for high frequency oscillators

4
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Balmer equation (visible light)

wavelength= h(m2/ m2- 22)

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Rydberg equation (general)

wavenumber= Rh (1/n21- 1/n22)

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Bohr frequency condition

ΔE= En2- En1 = hv

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What was De Broglie’s proposition

Light has wave-like and particle like properties

8
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De Broglie wavelength=

h/p= h/mv

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probabilty of finding the particle in a particular region(Born interpretation)

square of the wavefunction

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What is a node

Where the probability of finding the particle is 0

11
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Constraints pf wavefunction (4)

continuous, single valued at each point, continuous first derivative, not infinite over a finite region(no asymptotes)

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What is the uncertainty principle

impossible to specify momentum and position of particle simultaneously

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two functions are orthogonal if…

the integral of their product is 0

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bohr radius

r is proportional to n^2

15
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Bohr energy

En is proportional to -1/n^2