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Coherent light of wavelength 670 nm passes through two parallel slits separated by 0.50 mm. The...

Coherent light of wavelength 670 nm passes through two parallel slits separated by 0.50 mm. The interference pattern is observed on a screen 75 cm from the slits. If the width of each slit is 0.10 mm, how far from the central bright fringe is the first missing fringe?

a. 5.0 mm

b. 10 mm

c. 2.5 mm

d. 7.5 mm

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Answer #2

Distance from central maximum to n dark fringe is The fringe width in a interference pattern is Here, λ is the wavelength of the light, L is the distance from source to screen andd is the slit width.(here ,n-0,1,2 For first dark fringe n-0 (1 (670x10*m) (0.75m) 2) 0.1x10-3m 2.5mm

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