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22 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Energy
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E=hf=pc
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c, the speed of light
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3e8
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h, Planck's constant
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6.63e-34 Js
4.14e-15 eVs |
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Kinetic energy (photoelectric effect)
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K(max)=hf-ϕ
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ϕ stands for what? (photoelectric effect)
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Work function
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Wavelength and momentum are related how?
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ƛ=h/p
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Conversion of mass to/from energy
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ΔE=(Δm)c^2
Neither energy NOR MASS is conserved here! |
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Alpha (α) decay
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Eject Helium particle (2 protons, 2 neutrons)
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Beta (β) decay
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Eject electron (-1 protons, 0 neutrons)
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Gamma (γ) decay
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Eject an asterisk *.
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Planck did what idea?
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Energy is quantized
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black body radiation
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Einstein did what idea?
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Light is quantized into photons, and light doesn't always behave like a wave
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photoelectric effect
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Compton did what idea?
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Other waves don't always behave just like a wave
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X-ray scattering
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de Broglie did what idea?
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If waves are acting like particles, maybe particles are acting like waves?
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Bohr did what idea?
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Scrapped orbitals for energy levels in the atomic model
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As amplitude/intensity of light increases...
(photoelectric effect) |
...the amount of electrons released increases
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As the frequency of light increases...
(photoelectric effect) |
...the kinetic energy of released electrons increases
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Threshold frequency
(photoelectric effect) |
If f is less than threshold frequency, absolutely no electrons are emitted.
Electrons are emitted instantly upon achieving this frequency. |
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An electron can go up an energy level...
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...if it gains enough energy.
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An electron can go down an energy level...
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...by releasing energy in the form of a photon.
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Since energy is quantized...
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...we can predict the color of light emitted from photoelectric metals.
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The energy taken in and put out by an electron gaining and then losing energy levels...
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is equal, therefore the spectral lines seen for the drop will be unseen for the climb.
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