JEE Mains 29-Jan-2023 Shift 1 Solved Paper

In a Young's double slit experiment, two slits are illuminated with a light of wavelength 800‌nm. The line joining A1P is perpendicular to A1A2 as shown in the figure. If the first minimum is detected at P, the value of slits separation ' a ' will be :
The distance of screen from slits D=5‌cm