Map sapling learning As an admirer of Thomas Young, you perform a double-slit ex

Question

Map sapling learning As an admirer of Thomas Young, you perform a double-slit experiment in his honor. You set your slits 1.09 mm apart and position your screen 3.61 m from the slits. While Young had to struggle to achieve a monochromatic light beam of sufficient intensity, you simply turn on a laser with a wavelength of 641 nm. How far on the screen are the irst bright fringe and the second dark fringe from the central bright fringe? Express your answers in millimeters. First bright fringe Number Second dark fringe: Number

Explanation / Answer

find distance d of the slits
y = L*/d

y= 3.61*641*10^-9/1.09*10^-3
y = 2.1 x 10^-3 mts

= 2.1 mm

of second dark fringe

y = (2+.5)L*/d

y= 2.5*3.61*641*10^-9/1.09*10^-3
y = 5.3 x 10^-3 mts

= 5.3mm

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