Problem

Problem

A ray of light, travelling in a medium of refractive index μ\mu, is incident at an angle ii on a composite transparent plate consisting of three plates of refractive indices μ1,μ2\mu_1, \mu_2 and μ3\mu_3. The ray emerges from the composite plate into a medium of refractive index μ4\mu_4 at angle xx. Then, a. sin⁡x=sin⁡i\sin x = \sin i b. sin⁡x=μμ4sin⁡i\sin x = \frac{\mu}{\mu_4} \sin i c. sin⁡x=μ4μsin⁡i\sin x = \frac{\mu_4}{\mu} \sin i d. sin⁡x=μ1μ3μμ2μ2μ4sin⁡i\sin x = \frac{\mu_1 \mu_3 \mu}{\mu_2 \mu_2 \mu_4} \sin i

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