List of top Physics Questions on Refraction Through A Prism asked in UP Board XII

Prove that total internal reflection of light ray from refracting surface is possible only when the value of angle of prism A be more than \(\sin^{-1}\left(\frac{1}{n}\right)\), where 'n' is refractive index of the material of prism.
Derive Lens Maker's formula for a thin lens. Mention the effect of the refractive index and radius of curvature of the curved surfaces on the focal length of the lens.
Prism angle of a prism is $A$ and angle of minimum deviation is equal to prism angle. Refractive index of the material of prism will be:
What are the conditions for the minimum deviation by a prism? One face (AC) of a prism of refracting angle 30° and refractive index \( \sqrt{2} \), is silvered. What should be the angle of incidence \( i \) on the surface AB, so that after refraction into the prism, the reflected ray from the silvered surface retraces its path? See the figure.
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Draw a labelled ray diagram of an astronomical telescope and derive the formula of its magnifying power.
Draw (\(i - \delta\)) curve for a prism, and show angle of minimum deviation in the curve.

What is atomic model of magnetism? Differentiate between paramagnetic, diamagnetic, and ferromagnetic substances on this basis. Also, give one example of each.