22.3a Energy Levels and Line Spectra | A2 Quantum Physics | Cambridge A Level Physics

Energy levels (or bands) in atoms and how electrons interact with photons!
00:00 Electrons in Discrete Energy Levels/Bands
02:25 Electron absorb photon and excite!
06:35 Negative Electric Potential Energy Graph
09:22 Electron emit photon and de-excite
11:34 Absorption and Emission Spectra of Element
18:10 Absorption Spectra Dark Lines (Cool Gas)
25:28 Emission Spectra Bright Lines (Hot Gas)

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Practice Past Year Questions:
*starred Q's are in example videos
ON10 P41 Q7 (pg26) Calculate λmin
ON11 P41 Q7 (pg26) Emission and Absorption
ON11 P42 Q12 (pg30) Emission wavelength
MJ12 P41 Q8 (pg27) Spectrum Discrete Lvls
MJ13 P42 Q7 (pg28) Transition Diagram*
ON14 P41 Q8 (pg29) Absorption Diagram
FM17 P42 Q10 (pg30) Absorption Dark Lines
MJ17 P41 Q11 (pg31) Energy Level Changes[!]
ON18 P42 Q11 (pg32) Excitation Work Function*
MJ20 P41 Q10 (pg33) Dark Lines

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