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Quantum Basics

Let's start with photons and the electronvolt.

  1. The Photon

  2. The Electronvolt

  3. Practical - Finding Planck's Constant

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1. The Photon

What exactly is a photon? This video shows how we can use the particle model, with individual corpuscles of energy, to explain certain properties of EM radiation. 

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2. The Electronvolt

In everyday life we use the joule to measure energy. When we consider the energy of individual particles or photon it is often more convenient to use a smaller unit, the electronvolt, eV.

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3. Practical - Finding Planck's Constant

How to find the value of little 'h' yourself using some LEDs, a voltmeter and a variable power supply. Planck's constant is the constant of proportionality between the particle-like properties and the frequency of the associated wave.

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