Physics - Wave Optics Question with Solution | TestHub

Paragraph I: In a Young's double slit experiment, each of the two slits A and B, as shown in the figure, are oscillating about their fixed center and with a mean separation of $0.8\mathrm{mm}$. The distance between the slits at time $t$ is given by $d=(0.8+0.04\sin \omega t)\mathrm{mm}$, where $\omega =0.08\mathrm{rad}{\mathrm{s}}^{-1}$. The distance of the screen from the slits is $1\mathrm{m}$ and the wavelength of the light used to illuminate the slits is $6000\tilde{A}\dots$. The interference pattern on the screen changes with time, while the central bright fringe (zeroth fringe) remains fixed at point $O$.The $8^{\text{th }}$ bright fringe above the point $\mathrm{O}$ oscillates with time between two extreme positions. The separation between these two extreme positions, in micrometer $(\mu \mathrm{m})$, is ___________ .