MCQ
In the given figure, what is the angle of prism


- A$A$
- B$B$
- ✓$C$
- D$D$

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The refractive indices of the material of the prism for red, green and blue wavelength are $1.27, 1.42$ and $1.49$ respectively. The colour of the ray(s) emerging out of the face $PR$ is:


$STATEMENT-2$ The electrical potential of a sphere of radius $R$ with charge $\mathrm{Q}$ uniformly distributed on the surface is given by $\frac{\mathrm{Q}}{4 \pi \varepsilon_0 R}$.