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 mmand refractive 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 If the transparent slab is removed the fringe pattern shifts upward, the number of fringes shifted upward are

Light of wavelength lambda = 500 nm falls on two narrow slits placed a

1.	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 mmand refractive 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 If the transparent slab is removed the fringe pattern shifts upward, the number of fringes shifted upward are
Answer» 50 40 100 80 Answer :C

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