The diffraction pattern is therefore that due to a single aperture, merely brightened n times.
Dispersion may be caused either by refraction or by diffraction.
But the image of a star formed by a telescope is not a point but a minute disc, surrounded by a series of diffraction rings.
The diffraction spectrum is therefore termed a normal spectrum.
In 1818 he read a memoir on diffraction for which in the ensuing year he received the prize of the Acadmie des Sciences at Paris.
This inflection of the light receives the name of diffraction.
It is therefore certain that this is a phenomenon of the diffraction of light simply produced by the vesicles of the mist.
He took the spectrum produced by diffraction instead of refraction, and measured that.
The diffraction phenomena of the atmosphere are produced by the water drops of clouds and fog, or sometimes by fine dust.
Another way of obtaining considerable dispersion is by using a diffraction grating instead of a prism.
diffraction dif·frac·tion (dĭ-frāk'shən)
Change in the directions and intensities of a group of waves after passing by an obstacle or through an aperture.
The bending and spreading of a wave, such as a light wave, around the edge of an object. See more at wave.