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Coherent light of wavelength 650nm is normally incident (in the air) upon a double-slit apparatus of...

Coherent light of wavelength 650nm is normally incident (in the air) upon a double-slit apparatus of separation distance 2x10-4m & produces an interference pattern on a screen a perpendicular distance of 4m away.

a) What angle (in degrees) does the 5thorder (m = 5) bright fringe make (relative to the central maximum)?

b) How wide is the central maximum on the screen (i.e., how far apart (in cm) are the lowest order minima)?

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Answer #1

given da 650nm d = um 2X10 4 Mzs a. Angle = ? we know d sino md - dino = 5x650X10 2x104 smo zo.0/625 0 = 0.93° width of fring

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