Question

Question 4 5 pts A laser beam strikes a double slit with a slit spacing of 1.5E-5 m. The slit-to-screen distance is 2.0m. The first bright interference fringe is located 7 cm above the middle of the central bright maximum. What is the wavelength of the laser light? O 525 nm O 373 nm 0 454 nm 0 667 nm O 702 nm

Answer 1

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d = 1.5x5m, D=2m , x=7cm. Distance of 1st bright fringe above center 2D is 22 d 7x12= 2x2 lo5x105 ne X = Wavelength = 5.25000lm =525mm option (A) is Correct.