When light of wavelength $450 \mathrm {~nm}$ falls on a single slit of width $0.30 \mathrm {~mm}$, what is the angular width of the central bright region?

Question

Quizplus · Accepted Answer

The angular width of the central bright region is given by:$$\theta = \frac{2\lambda}{w}$$where $\lambda$ is the wavelength of light and $w$ is the width of the slit. Substituting the given values, we get:$$\theta = \frac{2(450 \mathrm {~nm})}{0.30 \mathrm {~mm}} = 0.17 ^ { \circ }$$Therefore, the correct choice is A.

When Light of Wavelength 450 nm450 \mathrm {~nm}450 nm Falls on a Single Slit of Width

When Light of Wavelength $450 \mathrm {~nm}$ Falls on a Single Slit of Width