Physics

Problem

In a Young's double slit experiment, the slits are separated by

0.3 \text{ mm}

and the screen is

1.5 \text{ m}

away from the plane of slits. Distance between fourth bright fringes on both sides of central bright is

2.4 \text{ cm}

. The frequency of light used is _____

\times 10^{14} \text{ Hz}

. [NA, Aug. 31, 2021 (II)]