Colour String
Pull the string and observe the oscillation
You will see coloured stripes on the vibrating string.
How is that possible—there is nothing striped here? The coloured lights shining on the string do not shine continuously; they flash very rapidly. The human brain adds together multiple stimuli over a short time and creates a smooth image. The moving string introduces spatial separation: each flash is seen at a different position in space, so the brain does not merge them.
Colour String uses vibration to spatially separate rapid flashes of red, green, and blue light, which we perceive as white light when the string is still.
