In a double slit experiment, it is observed that the angular width of one fringe formed on the screen is 0.2^°. The wavelength of light used in the…

Angular width $\displaystyle (\theta)=\frac{\lambda}{d}$ $\displaystyle d=\frac{\lambda}{\theta}$ $\displaystyle =\frac{500 \times 10^{-9}}{0.2 \times \dfrac{\pi}{180}}$ $\displaystyle d=\frac{45}{\pi} \times 10^{-5} \mathrm{~m}$ $\displaystyle =0.14 \mathrm{~mm}$