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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. In the lab, you measure the distance to the screen = 2.9 m, the wavelength of light = 620 nm, and the spacing between tick marks on the intensity figure = 0.5 cm.
Select all that are True.
The extinction 5 tic marks from central max is due to diffraction from every 4th slit.
The seven largest peaks are due to diffraction from adjacent slits.
A source of systematic error is that the spacing between the largest peaks is exactly equal to one tic mark.
The total number of slits is 5.
The first small peak, closest to the central max is due to diffraction from first and last slit.
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