Lasers are known for the monochromatic nature of their light, so much so that you might never have thought there could be such a thing as a white laser. But in the weird world of physics ...

Each colour within the visible light spectrum has its own narrow band of wavelength and frequency. When white light passes through a coloured filter, all colours are absorbed except for the colour ...

The light from the Sun looks white but it is actually a combination of many different colours of light. We can see this by splitting the sunlight using this glass prism. The colours are the same ...