The Photon Model A-level AQA Physics

Complete AQA A-level Physics lesson on the photon model, E = hf and the electronvolt. 22 editable slides, a 44-mark worksheet and a full mark scheme.

What’s in the PowerPoint

A starter recapping waves, with answers in the speaker notes
The ultraviolet catastrophe, with a graph comparing wave theory with what hot objects really give out, plus how Planck and Einstein explained it
Key words: quantum, quantised and photon
Photon energy using E = hf = hc/λ, with the EM spectrum and a worked example
The electronvolt: its definition, how to convert between J and eV, and worked examples both ways
Beam power, photons per second and intensity, with a laser worked example
Finding the Planck constant with LEDs: the circuit diagram, method, example results and the graph analysis
A common mistakes slide
Six check questions with answers, and an exit ticket
Teacher notes in the speaker notes throughout

What’s in the worksheet (44 marks)

Section A: recall of photons, quantisation and the electronvolt
Section B: a table to complete, moving between wavelength, frequency, joules and eV
Section C: photon rate, power and intensity calculations
Section D: LED data analysis, with a blank grid to plot V against 1/λ, finding h, and evaluating the method
A full mark scheme with mark points, on separate pages

Good for
First teaching, revision lessons, homework, cover lessons or practical write-ups. Both files are fully editable in PowerPoint and Word.