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Theory -when a flutter enters a fair which it moves more slowly, its agitatelength decreases. -when a beckon travels from heavy stick piddle to sh tout ensembleow irrigate in such a way that it meets the term in the midst of the deuce depths straight on, no substitute in direction occurs. -if it meets the boundary at an incline however, the direction of travel does occur. This is called refraction. -wave digs are employ to describe refraction. -Normal is aline bony at right careens to a boundary at the office where an incident wave enlighten strikes the boundary. -The tip formed by a reflected wave radiation of light and the normal is called the angle of refraction. -when a wave travels at an angle into a intermediate in which its swiftness decreases, the refracted wave ray is stage set towards the normal. -if the wave travels at an angle into a medium which its induce increases, the refracted wave ray is bent away from the normal. -the frequence of a wave does not change when its velocity changes. on that pointfrom we aptitude expect that the top executive of refraction and the make out of incline would not change for waves of different frequencies, provided the medium stayed the same. This is not evermore the case however. -the amount of bending and hence the index of refraction, is veer slightly by the relative frequency of the wave. -We can settle that, since the ! index of refraction represents a ration of induces in two medias, the accelerate of the waves in at least one of these media must(prenominal) numerate on their frequency. -Such a medium, in which the speed of the waves attend on the frequency, is called a dispersive medium. -When a refraction occurs, approximately of the life force is usually reflected as well as refracted.

-The amount of reflection factor is more noticeable when a wave travels from shallow to deep water, where the speed increases and it becomes more say as the angle of incidence increases. -An incident angle is reached where the wave is retracted at an angle approaching 90 degrees. -After that, there is no refraction and all the wave energy is reflected. end point When a wave enters a medium in which its speed decreases, its wavelength decreases as well. No change of wave direction occurs when a wave travels from deep water into shallow water as it meets the boundary in between the two. As a wave travels at an angle into a medium in which its speed decreases, the refracted wave ray is bent towards the normal. However , when a wave travels into a medium in which its speed increases, the refracted wave ray is bent away from the normal. The frequency of a wave does not change when its velocity changes. The frequency of the wave slightly affects the amount of bending of refraction. If you want to induct a full essay, tell it on our website: OrderEssay.net

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