In a Young's double-slit experiment the wavelength of light used
is 462 nm (in vacuum), and the separation between the slits is 2.1
× 10-6 m. Determine the angle that locates
(a) the dark fringe for which m = 0,
(b) the bright fringe for which m = 1,
(c) the dark fringe for which m = 1, and
(d) the bright fringe for which m =
2.