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GCSE Physics · key term
The spread of emitted radiation intensity across different wavelengths.
Used by AQA, Edexcel and OCR
Specification 4.6.3.2 · Paper 2
Revise: Perfect black bodies and radiationAn object does not emit just one wavelength. Its wavelength distribution shows how strongly it emits at each wavelength. As its temperature rises, the distribution becomes more intense and its peak moves towards shorter wavelengths.
Specification 5.15P · Paper 1
How the intensity of emitted radiation is spread across different wavelengths.
Do not say simply that a hotter body emits ‘more heat’. State that it emits electromagnetic radiation at greater intensity and that its wavelength distribution shifts towards shorter wavelengths, with a higher principal frequency.
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Specification P8.3d · Paper 2 (Foundation), Paper 4 (Higher)
The way the intensity of emitted radiation is spread across different wavelengths.
Revise: Radiation emissionA wavelength distribution describes how much radiation is emitted at each wavelength. Its highest point gives the wavelength at which the emission is most intense.
Paper 1, Paper 2
The spread of emitted radiation across different wavelengths.