Physics - Wave Optics Question with Solution | TestHub

The angular distance$\left(\theta \right)$is given by

$\theta =\frac{\lambda }{d}$

Given,$\theta =2°=\frac{\pi }{180}\times 2, \lambda =6980 \stackrel{\circ }{\mathrm{A}}$

$=6980\times {10}^{-10}\mathrm{ }\mathrm{m}$

$\therefore d=\frac{\lambda }{\theta }=\frac{6980\times {10}^{-10}\times 180}{3.14\times 2}$

$\Rightarrow d\approx 2\times {10}^{-5}\mathrm{m}$$=2\times {10}^{-2} \mathrm{mm}$