In a Young\'s double-slit experiment, a set of parallel slits with a separation

Question

In a Young's double-slit experiment, a set of parallel slits with a separation of 0.102 mm is illuminated by light having a wavelength of 550 nm and the interference pattern observed on a screen 4.50 m from the slits.
(a) What is the difference in path lengths from the two slits to the location of a second order bright fringe on the screen?
1(No Response) µm

(b) What is the difference in path lengths from the two slits to the location of the second dark fringe on the screen, away from the center of the pattern?
2

Explanation / Answer

Given that wave length of the light is =550nm the path difference for bright fringe is =m for m=2 =2    =1.1m path difference for dark fringe is =(m+1/2) for second order m=1 then =(3/2)     =0.825m path difference for dark fringe is =(m+1/2) for second order m=1 then =(3/2)     =0.825m

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