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Edexcel
YPH11
2018 specification
WPH12
WPH12
Unit 2: Waves and Electricity
Waves and the particle nature of light
Progressive waves and intensity · Stationary waves · Photons and the photoelectric effect · Diffraction and interference · Wave–particle duality · Energy levels and line spectra · The diffraction grating · Electromagnetic spectrum and polarisation · Refraction and optical fibres
9 subtopic lessons
Electric circuits
Electric current · E.m.f. and internal resistance · Potential difference and power · Kirchhoff's laws · Resistance and resistivity · Potential dividers
6 subtopic lessons