Geometrical OpticsHard

Question

A par axial beam is incident on a glass (n = 1.5) hemisphere of radius R = 6 cm in air as shown the distance of point of converge F from the plane surface of hemisphere  is : -

Options

A.12 cm
B.5.4 cm
C.18 cm
D.8 cm

Solution


(i) For (i)
v1 = × 6 × 2  = 18 cm
 For plane surface  : I1 → object
dapperent = × dactual = × (18 - R)
= × (18 - 6) = 8 cm

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