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Luminosity, intensity and distance
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From power to luminosity and intensity

From power to luminosity and intensity

A star emits electromagnetic radiation, and its luminosity LLL is the total power it emits. Because power is energy transferred each second, luminosity is measured in watts.

Luminosity, intensity and distance Lesson

  1. A Level
  2. /Physics
  3. /Luminosity, intensity and distance

Step-by-step lessons on Edexcel A Level Physics Luminosity, intensity and distance. Each one builds up to exam-style questions. Physics is one of the most mathematically demanding A Levels -- at least 40% of the marks across the three papers require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.

Lessons