A laser produces a third‐order dark fringe at an angle of relative to the central…

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

Problem

A laser produces a third‐order dark fringe at an angle of

0.86^{\circ}

relative to the central axis after passing through a single slit of width

0.25\,\text{mm}

. Without using the small‐angle approximation, determine the wavelength of the laser light. (a)

1.07\,\mu\text{m}

(b)

3.75\,\mu\text{m}

(c)

1.25\,\mu\text{m}

(d)

1.88\,\mu\text{m}