Light Flashcards
Light
The natural agent that stimulates sight and makes things visible.
Beam
A ray or shaft of light.
Ray
Each of the lines in which light (and heat) may seem to stream from the sun or any luminous body, or pass through a small opening.
Energy
The strength and vitality required for sustained physical or mental activity.
Luminous
Giving off light; bright or shining.
Non-luminous
Not capable of producing light, but can be capable of reflecting light from another source.
Speed of light
The distance light can travel in a unit of time through a given substance.
Shadow
A dark area or shape produced by a body coming between rays of light and a surface.
Electromagnetic wave
One of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity and that include radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
Frequency
The rate at which something occurs over a particular period of time or in a given sample.
Wavelength
The distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.
Colours
The property possessed by an object of producing different sensations on the eye as a result of the way it reflects or emits light.
Velocity
The speed of something in a given direction.
Colour spectrum
The distribution of colors produced when light is dispersed by a prism.
Reflection
The throwing back by a body or surface of light, heat, or sound without absorbing it.
