lateral inversion - objects appear back to front when seen in a reflected mirror
lens - part of the eye that focuses light onto the rentina
light year - distance light moves in one year
luminous object - object that gives off light
medium - material that energy passes through eg. sound or heat
non-luminous object - object that doens't give off light
normal - line at riht angles to a surface
opaque - a material that doesn't allow visible light to pass through it
primary colours - three colours that combine to give all the other colours seen by the human eye (blue, green and red)
pupil - the hole in the eye that allows light in
Comments
Report