Refraction close refractionProcess by which a wave changes speed and sometimes direction upon entering a denser or less dense medium, eg a light ray changes direction when refracted by a lens. from a ...

the hatched vertical line on the left represents the plane mirror; the dashed line is called the normal, drawn at 90° to the surface of the mirror; the angle of incidence, i, is the angle between the ...

Exploiting a novel technique called phase discontinuity, researchers have induced light rays to behave in a way that defies the centuries-old laws of reflection and refraction. The discovery has led ...