Physics - Geometrical Optics Question with Solution | TestHub

A ray of light of intensity $\mathrm{I}$ is incident on a parallel glass slab at point $\mathrm{A}$ as shown in diagram. It undergoes partial reflection and refraction. At each reflection, $25\%$ of incident energy is reflected. The rays $\mathrm{AB}$ and ${\mathrm{A}}^{\prime }{\mathrm{B}}^{\prime }$ undergo interference. The ratio of ${\mathrm{I}}_{\max }$ and ${\mathrm{I}}_{\min }$ is :