21) In the two-slit experiment, monochromatic light of frequency 5.00 x 1014 Hz passes through a pair of slits separated by 2.20 x 10-5 m. (c = 3.00 x 108 m/s) (a) At what angle away from the central bright spot does the third bright fringe past the central bright spot occur? (b) At what angle does the second dark fringe occur?

21) In the two-slit experiment, monochromatic light of frequency 5.00 x 1014 Hz passes through a pair of slits separated by 2.20 x 10-5 m. (c = 3.00 x 108 m/s) (a) At what angle away from the central bright spot does the third bright fringe past the central bright spot occur? (b) At what angle does the second dark fringe occur?