Diffraction — Prelims Questions

Light of wavelength $600\,\text{nm}$ is incident normally on a single slit of width $0.2\,\text{mm}$. The diffraction pattern is observed on a screen placed $2\,\text{m}$ away from the slit. What is the linear width of the central maximum?

In a single-slit diffraction experiment, if the width of the slit is doubled, how does the angular width of the central maximum change?

Which of the following statements is TRUE regarding the intensity distribution in a single-slit diffraction pattern?

A telescope has an objective lens of diameter $10\,\text{cm}$. If it is used to observe light of wavelength $500\,\text{nm}$, what is the minimum angular separation it can resolve according to the Rayleigh criterion?

Which of the following changes would lead to a *decrease* in the width of the central maximum in a single-slit diffraction pattern?

In a diffraction grating experiment, if the number of lines per centimeter on the grating is increased, what happens to the angular separation between the principal maxima?