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March 24, 2017

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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 4.90m away from the slits

a)What is the distance Δymax−max between the first maxima (on the same side of the central maximum) of the two patterns?

b)What is the distance Δymax−min between the second maximum of laser 1 and the third minimum of laser 2, on the same side of the central maximum?

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