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STD 12 - 9. Ray optics abd optical instruments — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 9. Ray optics abd optical instruments4 Marks
Question
A ray passes through a prism of angle $60^o$ in minimum deviation position and suffers a deviation of $30^o $. What is the angle of incidence on the prism......$^o$
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Answer

(b) $i = \frac{{A + {\delta _m}}}{2}$$ = \frac{{60^\circ + 30^\circ }}{2} = 45^\circ $

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