Physics A-Level
Malus's law
What Malus's law means in Physics A-Level, as defined for OCR.
Definition of Malus's law
Check what you remember
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Reference: OCR
The transmitted intensity I is given by I = I₀ cos²θ, where θ is the angle between the transmission axes.
Topics that use Malus's law
- Electromagnetic waves (OCR A-Level)
Related terms
- Critical angle
- Orders of magnitude across the spectrum
- Refraction
- Refraction in rectangular blocks
- Refractive index
- Shared wave behaviours and differing photon energies
- sin C = 1/n
- Spectrum ordering by wavelength and frequency
Using Malus's law in the exam
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