Two narrow slits are used to produce a double-slit interferencepattern with mono

Question

Two narrow slits are used to produce a double-slit interferencepattern with monochromatic light ( = 520 nm). The slits are separated by 1.00 mm, and the interference pattern is projectedonto a screen 7.0 m away from theslits. (a) What is the distance between two nearbybright fringes on the screen?
1 m

(b) What is the distance between two nearby dark fringes on thescreen? Assume the fringes are near the center of the interferencepattern.
2 m
(a) What is the distance between two nearbybright fringes on the screen?
1 m

(b) What is the distance between two nearby dark fringes on thescreen? Assume the fringes are near the center of the interferencepattern.
2 m

Explanation / Answer

Slit separation d = 1 * 10 ^ -3 m

Wavelength = 520 * 10^-9 m

Distance of the screen from slit D = 7 m

(a). the distance between two nearby bright fringes on thescreen = D / d

plug the values we get = 3.64*10^-3 m

(b). the distance between two nearby dark fringes on the screen= = 3.64*10^-3 m

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