52. Angle of deviation ( δ ) by a prism (refractive index = μ and supposing the angle of prism A to be small) can be given by ?
\( (a) \ \delta = (\mu - 1)A \)
\( (b) \ \delta = (\mu + 1)A \)
\( (c) \ \delta = \frac{\sin \frac{A+\delta}{2}}{\sin \frac{A}{2}} \)
\( (d) \ \delta = \frac{\mu - 1}{\mu + 1} A \)
Answer : \( (a) \ \delta = (\mu - 1)A \)
\( \frac{\sin i}{\sin r} = \mu \)
\( \frac{\sin \frac{\delta_{\min} + A}{2}}{\sin \frac{A}{2}} = \mu \)
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