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  4. In the diagram the ray passing through prism is parallel to the base. Refractive index of material of prism is

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Q. In the diagram the ray passing through prism is parallel to the base. Refractive index of material of prism isPhysics Question Image

Ray Optics and Optical Instruments

Solution:

image
By geometry $r=45^{\circ}$
[Alternate angles]
$\mu=\frac{\sin 60^{\circ}}{\sin 45^{\circ}}=\frac{\sqrt{3}}{2} \times \sqrt{2}$
$\mu=\sqrt{\frac{3}{2}}$