| (a) Draw a ray diagram to show the refraction of light through a glass slab and mark angle of refraction and the lateral shift suffered by the ray of light while passing through the slab. |
| (b) If the refractive index of glass for light going from air to glass is 3/2, find the refractive index of air for light going from glass to air. |
Answer:
(a) 
(b) Given: \[_{a}{{n}_{g}}=\frac{3}{2}\] \[\therefore \] \[_{g}{{n}_{a}}=\frac{1}{_{a}{{n}_{g}}}=\frac{1}{\frac{3}{2}}=\frac{2}{3}\]
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