Light Crossword

A unit of power equal to 1 joule per second; the power dissipated by a current of 1 ampere flowing across a resistance of 1 ohm.
The change of direction of a ray of light, sound, heat, or the like, in passing obliquely from one medium into another in which its wave velocity is different.
To cast something back from a surface.
Something that shines with a strong or dazzling light.
A tiny glint of light or the sliver of an idea.
Something that shines brightly and steadily, especially without a flame.
The rate per second of a vibration constituting a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light).
A typical star that is the source of light and heat for the planets in the solar system.
Something that shines with a brief, intermittent, flashing, glittering light.
A flat, coloured, ring-shaped membrane behind the cornea of the eye, with an adjustable circular opening (pupil) in the centre.
Re-emit, give off; diffuse; especially of a colour cast: to capture the colour from a surface; to re-broadcast diffuse light with a changed colour; redistribute with added colour; to scatter light and colour.
The removal of energy or particles from a beam by the medium through which the beam propagates.