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Q.

For  a small angled prism, angle of minimum deviation ( δ) varies with the refractive index of the prism as shown in the graph

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a

Slope of the PQ=A/2

b

Slope = A

c

Point P corresponds to  μ =1

d

None of the above statements is true

answer is A, C.

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Detailed Solution

For small angled prism 
δ=(μ−1)A⇒δ=μA−A⇒y=mx−C
slope m=A   

For point ‘P’
put  δ=0⇒μA=A⇒μ=1
 

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