A ray diagram showing refraction at the boundary between air and glass Refraction can cause optical illusions as the light waves appear to come from a different position to their actual source.

Medical imaging experts are adept at solving common optical illusions, according to new research. The research is the first to show that people can be trained to do better at solving visual illusions, ...

The reflection and refraction of light explains how people see images, colour and even optical illusions. Sample exam questions - light & the electromagnetic spectrum - Edexcel Understanding how ...

One of the most admired meteorological phenomena, rainbows are formed through a process called refraction ... that seems to touch the earth is an optical illusion that changes based on the ...