Physics - Wave Optics Question with Solution | TestHub

A ray of light of intensity$I$is incident on a parallel glass-slab at the point$A$and it undergoes partial reflection and refraction as shown in the figure. At each reflection,$25\%$of the incident energy is reflected and the rest is transmitted. If the rays$AB$and$A\prime B\prime$undergo interference, then the ratio$\frac{I_{\max }}{I_{\min }}$is