JEE Main 28 June 2022 Shift 2 Solved Paper

In a Young's double slit experiment, an angular width of the fringe is 0.35∘ on a screen placed at 2m away for particular wavelength of 450‌nm. The angular width of the fringe, when whole system is immersed in a medium of refractive index 7∕5, is ‌

1

α

. The value of α is____