What does white light contain?
A mixture of visible colours.
Cambridge IGCSE (9–1) Physics 0972 (Extended) (2026–2028) · 3.2.4
Revise Cambridge IGCSE (9–1) Physics 0972 (Extended) (2026–2028) specification point 3.2.4, Dispersion of light, with free active-recall flashcards. Flip through the set or review every question and answer below.
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What does white light contain?
A mixture of visible colours.
How does a glass prism disperse white light?
It refracts the colours by different amounts, spreading them into a visible spectrum.
Which colours of white light are deviated most and least by a glass prism?
Violet is deviated most; red is deviated least.
What are the seven traditional colours of the visible spectrum in order of increasing frequency?
Red, orange, yellow, green, blue, indigo, violet.
How are frequency and wavelength related for light in the same medium?
They are inversely related: as frequency increases, wavelength decreases.