With a single slit and a screen away

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

Problem

With a single slit and a screen

1.0\,\text{m}

away, green light of wavelength

500\,\text{nm}

produces a central maximum

4.0\,\text{mm}

wide. If the light is replaced by violet light of wavelength

400\,\text{nm}

, what should be the new slit width so that the central maximum remains

4.0\,\text{mm}

wide? (a)

0.25\,\text{mm}

(b)

0.20\,\text{mm}

(c)

0.31\,\text{mm}

(d)

0.10\,\text{mm}