He found that if a beam of white light is passed through glass prism then it will split in to seven colours. These colours are red, orange, yellow, green, blue, indigo and violet (VIBGYOR).

His glass prisms not only let light pass through but also redirected it sideways into the room. Hayward’s prisms were based on total internal reflection which occurs when light tries to exit the ...

A project from the Harvard SEAS lab of metamaterials developer Federico Capasso could help address the issue of unwanted light dispersion in optical systems.. This could be a particular benefit for ...