| 单词 | interference |
| 释义 | interference The interaction of two or more wave motions affecting the same part of a medium so that the instantaneous disturbances in the resultant wave are the vector sum of the instantaneous disturbances in the interfering waves. The phenomenon was first described by Thomas Young in 1801 in light waves; it provided strong evidence for the wave theory of light. In the apparatus known as Young's slits , light is passed from a small source through a slit in a screen and the light emerging from this slit is used to illuminate two adjacent slits on a second screen. By allowing the light from these two slits to fall on a third screen, a series of parallel interference fringes is formed. Where the maximum values of the two waves from the slits coincide a bright fringe occurs (constructive interference ) and where the maxima of one wave coincide with the minima of the other dark fringes are produced (destructive interference ). Newton's rings are also an interference effect. Because lasers produce coherent radiation they are also used to produce interference effects, one application of their use being holography. See also interferometer |
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