A physics professor wants to perform a lecture demonstration of Young's double-slit experiment for her classusing the 633-nm light from a He-Ne laser. Because the lecture hall is very large, the interference pattern willbe projected on a wall that is 6 m from the slits. For easy viewing by all students in the class, the professorwants the distance between the m=0 and m=1 maxima to be 50 cm. What slit separation is required in order toproduce the desired interference pattern?

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