In Young's double-slit experiment

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

Problem

In Young's double-slit experiment, the slits are illuminated by light of wavelengths

400\,\text{nm}

and

600\,\text{nm}

. If the slit separation is

d=1\,\text{mm}

and the screen distance is

D=10\,\text{m}

, then the smallest distance from the central maximum where there is complete darkness is: (a)

2\,\text{mm}

(b)

3\,\text{mm}

(c)

12\,\text{mm}

(d) There is no such point