Eksperyment z podwójną szczeliną: szerokości prążków (jedna długość fali)

A double-slit experiment is setup with two slits $0.8\text{mm}$‍ apart and the screen placed $70\text{cm}$‍ from the plane of the slits.

When monochromatic light is shone on the slits, it's seen that the tenth bright fringe is $5.6\text{mm}$‍ from the central bright fringe.

$\text{nm}$‍