Physics

Problem

In a Young’s double-slit arrangement, monochromatic light of wavelength

600\,\text{nm}

falls on two very narrow slits separated by

0.40\,\text{mm}

. The interference pattern is observed on a screen

1.2\,\text{m}

away from the slits. a. (a) Calculate the fringe width on the screen. b. (b) A point

P

on the screen is located

2.0\,\text{mm}

above the central bright fringe. Determine the path difference between the two waves arriving at

P

and state whether

P

lies on a bright or a dark fringe. c. (c) How far from the central bright fringe will the ninth bright fringe be observed?