phase difference of waves from s1 and s2 at point P is effectively
In Young’s interfernce experiment has a set up as shown in figure, consider that a source of monochromatic light of wavelength 5000Å is placed at S.S1 and S2 are equidistant from S and have equal widths. A wvefront, eit light waves, which superimpose to result in an interference pattern on the screen kept at position (1). this is an experiment where coherent sources are obtained by division of wavefront. O is a point on the screen equidistant from S1andS2 . P is a point on the screen 1 mm from O at which path difference between waves from S1andS2 is 11250Å. Position of amy point on the screen can be expressed by θ . The path difference is zero at O and a central bright fringe of intensity I0 is obtained at O. Q is another point 2 mm from O. If the screen is now shifted to a new position (2) [not shown in figure] so that D changes, the fringe width is found to be 50% more than its earlier value and the angular fringe width is 190 radian. Answer the following question [assume D to be large and θ very small so taht sin≈tanθ≈θ ] (a) When the screen is at position (1), phase difference of waves from s1 and s2 at point P is effectively
13
Sep
In Young’s interfernce experiment has a set up as shown in figure, consider that a source of monochromatic light of wavelength 5000Å is placed at S.S1 and S2 are equidistant from S and have equal widths. A wvefront, eit light waves, which superimpose to result in an interference pattern on the screen kept at position [...]