Wave Optics — Prelims Questions

In Young's Double Slit Experiment (YDSE), the distance between the slits is $0.5\,\text{mm}$ and the screen is placed $1.0\,\text{m}$ away. If the wavelength of light used is $5000\,\mathring{A}$, what is the fringe width?

Unpolarized light is incident on a plane glass surface. The reflected light is found to be completely plane-polarized. If the refractive index of the glass is $1.5$, what is the angle of incidence?

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

Two coherent monochromatic light beams of intensities $I$ and $4I$ are superposed. What are the maximum and minimum possible intensities in the interference pattern?

Which of the following phenomena provides conclusive evidence for the transverse nature of light?

In a YDSE setup, if the entire apparatus is immersed in water (refractive index $n_w = 4/3$), how does the fringe width change compared to when it was in air?