Physics - Wave Optics Question with Solution | TestHub

Figure shows two coherent microwave source ${\mathrm{S}}_1$ and ${\mathrm{S}}_2$ emitting waves of wavelength $\lambda$ and separated by a distance $3\lambda$. For $\lambda \ll \mathrm{D}$ and $\mathrm{y}\ne 0$, the minimum value of y for point P to be an intensity maximum is $\frac{\sqrt{\mathrm{m}}\mathrm{D}}{\mathrm{n}}$. Determine the value of $\mathrm{m}+\mathrm{n}$, if m and n are coprime numbers.