Physics - Wave Optics Question with Solution | TestHub

Intensity is proportional to square of the amplitude. $\mathrm{I}\propto {\mathrm{a}}^2$ $\therefore \sqrt{\mathrm{I}}\propto \mathrm{a}$ Maximum intensity is produced when the two amplitudes get added (phase difference is $2n\pi$ ). $\therefore {\mathrm{I}}_{\max }\propto {\left({\mathrm{a}}_1+{\mathrm{a}}_2\right)}^2$ or ${\mathrm{I}}_{\max }\propto {\left({\sqrt{\mathrm{I}}}_1+{\sqrt{\mathrm{I}}}_2\right)}^2$