Colours
Physics: AQA GCSE Higher, topic 6.4.12
Colours
Each colour within the visible light spectrum has its own narrow band of wavelength and frequency. In other words, the colours have different wavelengths and frequencies.
Colour filters
- Colour filters absorb certain wavelengths (colours) and transmit other wavelengths (colours).
- Objects appear as different colours based on how the colours of white light are absorbed and reflected.
Colour of opaque objects
- When an opaque object looks like it has a particular colour, it is reflecting light of that particular wavelength (colour) and absorbing all other wavelengths.
- If all wavelengths are reflected equally, the opaque object looks white.
- If all wavelengths are absorbed, the object looks black.