What should be the distance between the two slits

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Reference no: EM13975139

In front of a lecture hall, a coherent beam of monochromatic light from a helium-neon laser (λ= 632.8 nm) illuminates a double-slit. From there it travels a distance of 20.0 m to a mirror at the back of the hall, and returns the same distance to a screen.

(a) In order that the distance between interference maxima be 10.0 cm, what should be the distance between the two slits?

(b) State what you will see if the lecturer slips a thin sheet of cellophane over one of the slits. The path through teh cellophane contains 2.5 more waves than a path through air of the same geometric thickness.

Reference no: EM13975139

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