For a small angled prism with prism angle A,t | vedclass

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(D) For a small angled prism,the angle of minimum deviation $\delta_m$ is given by the formula:$\delta_m = (\mu - 1)A$This equation represents a strai

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Both $(a)$ and $(c)$.

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(D) For a small angled prism,the angle of minimum deviation $\delta_m$ is given by the formula:$\delta_m = (\mu - 1)A$This equation represents a straight line of the form $y = mx + c$,where $y = \delta_m$,$x = \mu$,$m = A$,and $c = -A$.At point $P$,the deviation $\delta_m = 0$. Substituting this into the formula:$0 = (\mu - 1)A$Since $A 
eq 0$,we have $\mu - 1 = 0$,which implies $\mu = 1$. Thus,point $P$ corresponds to $\mu = 1$.Comparing $\delta_m = A\mu - A$ with the linear equation $y = mx + c$,the slope $m$ is equal to $A$.Therefore,both statements $(a)$ and $(c)$ are correct.

For a small angled prism with prism angle $A$,the angle of minimum deviation $(\delta_m)$ varies with the refractive index $(\mu)$ of the prism as shown in the graph.

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