Double slit experiment The monochromatic light diffracts on the two slits which are 0.

Double slit experiment The monochromatic light diffracts on the two slits which are 0.1 mm apart (their size is negligible) and produces an interference pattern on the wall which is 3 m far from the apparatus.

a) The distance between the central bright fringe and the first off-center bright fringe is 2 cm. What is the wavelength of the light? Which color is it? b) How many bright and dark fringes could we see on the wall?