QJEEM22Phcece: JEE Main 2022 Physics - Class 12 JEEM22Phcece Solution: In a Young's double slit experiment, an angular width of the…

In a Young's double slit experiment, an angular width of the fringe is 0.35$${}^{\circ }$$ on a screen placed at 2 m away for particular wavelength of 450 nm. The angular width of the fringe, when whole system is immersed in a medium of refractive index 7/5, is $$\frac{1}{\alpha }$$. The value of $$\alpha$$ is ___________.