IB Physics E.2 Quantum Physics | Past Paper Walkthrough | GradePod (HL)

Описание: This is the Higher Level past paper walkthrough for E.2 Quantum Physics in IB Physics. E.2 is an HL-only topic, and it's one of the trickier ones. I've deliberately put the hardest questions first because I think it's better to tackle them early and build from there. We cover a full range: multi-part Paper 2 questions on energy levels and the photoelectric effect, multiple choice questions on wave-particle duality, de Broglie wavelength calculations, stopping potential, and Compton scattering.

If you haven't watched the concept tutorial yet, start there first:
👉 E.2 Quantum Physics Concept Tutorial:    • IB Physics E.2 Quantum Physics | Concept T...  

Want to try these questions yourself before watching the solutions? They're all in the GradePod Exam Pack, sorted by topic with full mark schemes.

👉 Topic page + free checklist: https://www.gradepod.com/topics/e2-qu...

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QUESTIONS COVERED IN THIS VIDEO
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0:10 Q1: UV lamp photons hitting a photoelectric surface: energy calculation, max KE, and stopping potential (multi-part Paper 2 question)
8:47 Q2: Which observation is evidence for the wave nature of the electron?
9:54 Q3: Photoelectric cell connected to a battery: max KE of emitted photoelectron
11:33 Q4: Green light on a zinc plate produces no photoelectrons: what change would cause emission?
13:25 Q5: Photons on a metal surface: calculating the work function
15:04 Q6: Metallic surface irradiated with infrared: effect on photoelectron emission
16:34 Q7: Very low intensity light causes electron emission almost instantly: explain using the photon model (extended response)
23:47 Q8: Three observations of electron behaviour: which show particle properties?
24:55 Q9: Monochromatic beam with photon momentum p: relationship between photon energy and de Broglie wavelength
25:47 Q10: de Broglie wavelength of a particle near the speed of light
34:52 Q11: Monochromatic light on a metal surface: effect of changing frequency and intensity on photoelectron emission
35:55 Q12: Two radiation sources: comparing photoelectric effect outcomes
39:59 Q13: Stopping voltage circuit: ammeter reads zero, finding threshold frequency
43:52 Q14: Electron interacts with an atom: energy and frequency relationship
44:42 Q15: Photoelectric experiment graph: stopping voltage vs frequency
46:50 Q16: Stopping voltage experiment: calculating the work function
49:16 Q17: Final question (remaining questions left for independent practice)

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The GradePod Exam Pack gives you all the past paper questions for every topic, sorted and ready to use:

✓ Topic-by-topic past paper questions: do them before watching this video
✓ Full mark schemes for every question
✓ Knowledge questions to test your understanding of the concepts
✓ Revision note template, mock exam and annotated data booklet

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I'm Sally Weatherly, IB Physics teacher since 2004, Fellow of the Institute of Physics, and founder of GradePod. Every tutorial is free. No login, no catch.

👉 All 24 topics, free: https://www.gradepod.com/topics

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