Biography, Science, Technology, Health, History Blogs

Describe the light wave properties? The light wave properties are described here. light wave properties Shape of fringes 1) The interference fringes are usually hyperbolic I in shape, because for given value of n , locus of path difference between light  waves  from two slits is a hyperbola. 2) When the screen is at 90˚ to the line joining foci of the hyperbola, the fringes are circular. 3) When distance of screen is very large compared to the  distance  between the slits, the fringes are straight. Note that the fringe obtained at the centre of the screen is called fringe of zeroth order. Circular Wave front We know that when we through a piece of stone on the surface of water, we get circular wave fronts. As the wave fronts expand, the heights of crests and depths of troughs go on decreasing. This is because same energy is distributed over circular wave fronts of larger and radii. If r is radius of circular wave fronts, its perimeter = 2πr. Col...