Two lasers are shining on a double slit, with slit separation d. Laser 1 has a w

Question

Two lasers are shining on a double slit, with slit separation d. Laser 1 has a wavelength of d/20, whereas laser 2 has a wavelength of d/15. The lasers produce separate interference patterns on a screen a distance 4.50 m away from the slits. Which laser has its first maximum closer to the central maximum What is the distance delta y_max-max between the first maxima (on the same side of the central maximum) of the two patterns What is the distance delta y_max-min between the second maximum of laser 1 and the third minimum of laser 2, on the same side of the central maximum Express your answer in meters.

Explanation / Answer

(a)Laser 1

(b)x(1) = n L / d = 1 x (d/ 20) x 4.5 / d = 0.225 m

x(2) = 4.5 / 15 = 0.3m

So distance between them is 0.08 m

(c) x(1) = 0.45 ( for the 2nd max )

x(2) = 2.5 . 0.3 = 0.75m ( for the 3rd in )

Separation = 0.3 m

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