# We often see it like this

We do an experiment with various transparent cylindrical rods made of different refractive indices and place it on ruled white paper of a usual exercise book. If the rod is placed with its axis at some angle $$\theta=\frac{\pi}{4}$$ the lines appear broken and tilted at some angle $$\alpha$$ The minimum refractive index of the glass that shows this phenomenon at this angle $$\theta=\frac{\pi}{4}$$ is $$\mu_{o}$$ and gives an deviation $$\alpha=\alpha_{1}$$ find $$\mu_{o}\alpha_{1}$$ where $$\alpha_{1}$$is in radian

×