In a certain double-slit experimental arrangement

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

Problem

In a certain double-slit experimental arrangement, interference fringes of width

1.0\,\text{mm}

are observed when light of wavelength

5000\,\text{\AA}

is used. Keeping the set-up unaltered, if the source is replaced by another of wavelength

6000\,\text{\AA}

, the fringe width will be: (1)

0.5\,\text{mm}

(2)

1.00\,\text{mm}

(3)

1.2\,\text{mm}

(4)

1.5\,\text{mm}