Physics

Problem

In a double-slit experiment, the screen is

1.6\,\text{m}

away from the slits that are separated by

0.50\,\text{mm}

. If monochromatic light of wavelength

400\,\text{nm}

is used, which order bright fringe appears at a point

6.4\,\text{mm}

from the central maximum? a) Fourth b) Fifth c) Eighth d) Third