DrG-Physics · Wave-Particle Duality · SQA Higher Physics revision

Higher Physics on the photoelectric effect, photons, and de Broglie. Five SQA-style questions fully worked. EXAM + STUDY editions included.

A focused single-topic revision companion on Wave-Particle Duality for SQA Higher ‘Particles & Waves’. Covers the photoelectric effect, Einstein’s photon equation, and the de Broglie wavelength of matter.

The DrG-Physics revision companion is not a worksheet. It is a structured exam-thinking guide — built around the way an SQA marker reads your script. Each worked solution leads with the relationship the examiner is looking for, substitutes cleanly, and evaluates with units. Every question carries a marker-aligned command-word tag (CALCULATE · 2 marks · STATE + JUSTIFY) so students learn what kind of answer earns each mark.

WHAT’S INSIDE
• Theory chapter on photons, the photoelectric effect, threshold frequency, work function, and de Broglie wavelength
• Five SQA-style questions covering photon energy and frequency, Einstein’s photoelectric equation, threshold-frequency comparisons, electron de Broglie wavelength, and electron diffraction as wave evidence
• Special focus on the conceptual question SQA examines every year: ‘What happens to KE when intensity doubles?’ (answer: nothing — and why)
• Examiner’s Note after every question naming the typical pitfall
• Do/Don’t pair to reinforce SQA marking conventions

TWO EDITIONS · ONE DOWNLOAD
• EXAM Edition — clean, concise solutions for printing and exam-style practice
• STUDY Edition — same content plus ‘Why’ reasoning panels before each part

PART OF THE SERIES
This is one of eight focused topics in the DrG-Physics ‘Particles & Waves’ series. Try PW01 — Standard Model FREE to experience the approach. The complete series is also available as Volume I (Matter) and Volume II (Light) bundles.

Written and produced by Dr Godoy, GTCS-registered Physics teacher, Edinburgh.
Tags:
SQA Higher Physics, wave-particle duality, photoelectric effect, photons, work function, de Broglie, electron diffraction, exam revision, Higher Physics