# Slide Preview for Module 4 - Electrons, Waves and Photons

Below are the previews for the slide in **Module 4 - Electrons, Waves and Photons**. If you click on them, you can see larger versions. If you are on a computer you can press the left and right arrows to move. You can also click the arrows to the left and right of the screen.

## Powerpoint Description:

This PowerPoint covers the entirety of module 4 from the OCR 2015 A Level Physics course, including: electric current and how conventional current is different, calculating charge, current in wires and electrolysis, what happens to current and voltage in series and parallel, Kirchoff's Laws, carrier density, drift speed, comparing drift speeds in wires of different thicknesses, circuit symbols, work done, the definition of EMF, accelerating electrons, calculating resistance, Ohm's Law, current-voltage graphs for bulbs, resistors, diodes and LEDs, characteristics of thermistors and LDRs, using thermistors and LDRs in circuits, resistivity and how to determine it practically, power, the cost of electricity, KWh, resistors in series and parallel, Kirchoff's laws applied to circuits with more than one EMF, internal resistance, determining EMF and internal resistance, potential dividers, potentiometers, definitions of terms such as amplitude, frequency and longitudinal/transverse waves, the wave equation, phase difference, using oscilloscopes, reflection, refraction, diffraction, intensity of a wave, the electromagnetic spectrum, polarisation, Snell's Law, critical angle, coherence, superposition, path difference, Young's Double Slit experiment, standing waves, harmonics, particle theory vs wave theory, photons, using LEDs to determine the Plank Constant, photoelectric emission, calculating photon energy, wave-particle duality, electron diffraction.Click here to register and to download this PowerPoint file

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