A manufacturer lists the width of a diffraction slit as

PHYSICS · Single correct · CBSE · Physics · Wave Optics · Wave Optics

Problem

0.140\,\text{mm}

. A student uses light of wavelength

520\,\text{nm}

and positions a screen

1.8\,\text{m}

away. The first diffraction minimum is measured at

6.4\,\text{mm}

from the center of the pattern. What is the percent difference between the student’s calculated slit width and the manufacturer’s value? (a)

43\%

(b)

0.4\%

(c)

9\%

(d)

4\%