(a) A double-slit experiment is set up using red light (λ = 717 nm). A first order bright fringe is seen at a given loca

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(a) A double-slit experiment is set up using red light (λ = 717 nm). A first order bright fringe is seen at a given location on a screen. What wavelength of visible light (between 380 nm and 750 nm) would produce a dark fringe at the identical location on the screen? 2 478 478 OK = nm Help Reset m Help Enter Double-Slit * HELP: Find the expression for a first order bright fringe (of a double slit experiment). Then find the expression for dark fringes. Enter (b) A new experiment is created with the screen at a distance of 2.2 m from the slits (with spacing 0.08 mm). What is the distance between the second order bright fringe of light with λ = 689 nm and the third order bright fringe of light with λ = 413 nm? (Give the absolute value of the smallest possible distance between these two fringes: the distance between bright fringes on the same side of the central bright fringe.) |x| =