You are looking at a liquid crystal display (LCD) right now, but what are liquid crystals? Check back for new posts every week!
Tuesday, 31 December 2013
Colours of light have different wavelengths. If a repeating structure has the same length as the light's wavelength, then that light can be reflected. In this picture, a liquid crystal whose structure varies across the image allows different colours of light to pass through, resulting in this rainbow-like picture.