A plane monochromic light falls normally on a diaphragm with two narrow slits separated by a distance d = 2.5mm. A fringe pattern is formed on the screen placed at D = 100 cm behind the diaphragm.If one of the slits is covered by a glass plate of thickness 10 mu m, then distance by which these fringes will be shifted is :

A plane monochromic light falls normally on a diaphragm with two narro

1.	A plane monochromic light falls normally on a diaphragm with two narrow slits separated by a distance d = 2.5mm. A fringe pattern is formed on the screen placed at D = 100 cm behind the diaphragm.If one of the slits is covered by a glass plate of thickness 10 mu m, then distance by which these fringes will be shifted is :
Answer» 2 mm 3 mm 4 mm 5 mm Solution :`(MU -1) t = (xd)/(D)` `therefore X = ((mu - 1)t D)/(d) = 0.2 cm`

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