» HW #8 (07/26 Th 11:59 PM) » Slit spacing and slit width Timer NotesEvaluatPrin

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» HW #8 (07/26 Th 11:59 PM) » Slit spacing and slit width Timer NotesEvaluatPrint Course Contents » Feedback A set of narrow vertical slits is located a distance D from a screen. The slits are equally spaced and have the same width. The intensity pattern in the figure is observed when light from a laser passes through the slits, illuminating them uniformly. The screen is perpendicular to the direction of the light. Data: Distance to the screen 2.83 m, Wavelength of light 520 nm, Distance between tick marks on the intensity figure 1.30 cm. What is the spacing between the slits? Submit Answer Tries 0/12 Calculate the width of the slits. Submit Answer Tries 0/12 If the slit separation is increased by a factor of 3, what would be the distance between the principal peaks on the screen? submit Answer Tries 0/12

Explanation / Answer

Total distance of first fringe from central maxima =wavelength*D/d=1.3*10^(-2)

we got d=spacing between slits=1.132*10^(-3) m

(b) slit width is a

distance between central maxima of diffraction=10*1.3*10^(-2)=0.13 m

distance=2*wavelength*D/a

a=2.264*10^(-4) m

(c) if d'=3d

distance between principle peaks will reduce by three times =0.433 cm

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