In YDSE, bichromatic light of wavelengths 400 nm and 560 nm are used. The distance between the slits is 0.1 mm and the distance between the plane of the slits and the screen is 1 m. Find the minimum distance between two successive regions of complete darkness.
a. 4 mm
b. 5.6 mm
c. 14 mm
d. 28 mm