An opening.
The bending of waves around obstacles, or the spreading of waves by passing them through an aperture.
The complete range of electromagnetic waves on a continuous distribution from a very low range of frequencies and energylevels, with a correspondingly long wavelength, to a very high range of frequencies and energy levels, with a correspondingly short wavelength. Included on the electromagnetic spectrum are long-wave and short-wave radio; microwaves; infrared, visible, and ultraviolet light; x rays, and gamma rays.
The number of waves passing through a given point during the interval of one second. The higher the frequency, the shorter the wavelength.
A wave in which the movement of vibration is in the same direction as the wave itself. A sound wave is an example of a longitudinal wave.
A three-dimensional glassshape used for the diffusion of light rays.
The act or state of traveling from one place to another.
In a general sense, radiation can refer to anything that travels in astream, whether that stream be composed of subatomic particles or electromagnetic waves.
A phenomenon whereby a light ray is returned toward its source rather than being absorbed at the interface.
The bending of a lightray that occurs when it passes through a dense medium, such as water or glass.
The continuous distribution of properties in an ordered arrangement across an unbroken range. Examples of spectra (the plural of "spectrum") include the colors of visible light, or the electromagnetic spectrum of which visiblelight is a part.
A wave in which the vibration or motion is perpendicular to the direction in which the wave is moving.
The distance between a crest and the adjacent crest, or the trough and an adjacent trough, of a wave. The shorter the wavelength, the higher the frequency.
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