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Light of wavelength lambda= 500 nm falls on two narrow slits placed a distance d= 50 xx 10^(-4) cm apart, at an angle phi= 30^@ relative to the slits shown in figure. In front of the lower slit, a slab of thickness 0.1 mm and refractie index 3/2 is placed. THe interference pattern is observed on a screen at a distance D= 2m from the slits S_1 O = S_2 O = d//2 The position of central maxima is at an angular position thetawith line OB |
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Answer» `30^(@)` above OB |
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