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9. Ray optics abd optical instruments — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics9. Ray optics abd optical instruments1 Mark
MCQ
Under minimum deviation condition in a prism, if a ray is incident at an angle $30^o$, the angle between the emergent ray and the second refracting surface of the prism is......$^o$
  • A
    $0$
  • B
    $30$
  • C
    $45 $
  • ✓
    $60$
✓

Answer

Correct option: D.
$60$
d
(d) In minimum deviation $i = e = {30^o},$

so angle between emergent ray and second refracting surface is

${90^o} - {30^o} = {60^o}$

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