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Photons
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Light as wave and photon

Light as wave and photon

Light still obeys the wave relation c=fλc = f\lambdac=fλ, but when it exchanges energy with matter it can behave as photons, which are discrete packets of electromagnetic radiation. The energy of one photon is E=hf=hcλE = hf = \frac{hc}{\lambda}E=hf=λhc​, so higher frequency and shorter wavelength both mean more energetic photons.

Photons Lesson

  1. A Level
  2. /Physics
  3. /Photons

Step-by-step lessons covering Eduqas A Level Physics Photons for A Level Physics. Each lesson works through exam-style questions in Component 1, Component 2 and Component 3 format. Physics is one of the most mathematically demanding A Levels -- a minimum of 40% of the marks require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.