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Summary PhotoElectric Effect
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Notes on Photoelectric Effect and Photons
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Photoelectric EffectElectro Magnetic Radiation
Lambda
Electro Magnetic Spectrum
, Wavelength in m
C = 3x108
𝑐 = 𝜆𝑓 Frequency in Hz
Planck’s constant h=6,6x10-34
Energy in J
𝐸 = ℎ𝑓
Frequency in Hz
Wave Equation
ANY WAVE
𝑽 = 𝝀𝒇 in m.s-1 or Hz=s-1
ANY EM WAVE
𝑪 = 𝝀𝒇
1
𝜆∝
𝑓
Photons and Electrons
The speed of electromagnetic (EM) radiation in a vacuum
(c=3x108 m.s-1)
𝑚 = 10−3 𝑘 = 103
𝜇 = 10−6 𝑀 = 106
𝑛 = 10−9 𝐺 = 109
𝑝 = 10−12 𝑇 = 1012
Photon:
A quantum (packet) of energy (of electromagnetic radiation)
Accelerating Charge: Generates electric and magnetic field
1 eV = 1,6 x 1019J
Emission and Absorption
By identifying elements you prove that there are energy levels in an atom
Lines on the atomic spectrum = electron transitions between energy levels
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