QNEET-2018-Ph-917: NEET 2018 Physics - Class 12 NEET-2018-Ph-917 Solution: In Young's double slit experiment the separation d between the…

In Young's double slit experiment the separation d between the slits is 2 mm the wavelength $\lambda$ of the light used is 5896 $\text{\AA}$ and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is $0.20^\circ$. To increase the fringe angular width to $0.21^\circ$ (with same $\lambda$ and D) the separation between the slits needs to be changed to 1.9 mm 1.8 mm 2.1 mm 1.7 mm