In a Young’s double-slit experiment

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

In a Young’s double-slit experiment, monochromatic light of wavelengths

\lambda_1 = 600\,\text{nm}

and

\lambda_2 = 480\,\text{nm}

are used simultaneously. The slit separation is

0.20\,\text{mm}

and the screen is

1.6\,\text{m}

away. What is the distance on the screen between the third-order bright fringe of

\lambda_1

and the fourth-order bright fringe of

\lambda_2

? (a)

0.48\,\text{mm}

(b)

4.32\,\text{mm}

(c)

0.96\,\text{mm}

(d)

1.92\,\text{mm}