Geometrical OpticsHard
Question
A diverging lens of fiscal length 10 cm is placed 10 cm in front of a plane mirror as shown in the figure. Light from a very far away source falls on the lens. The final image is at a distance: -
Options
A.20 cm behind the mirror
B.7.5 cm in front of the mirror
C.7.5 cm behind the mirror
D.2.5 cm in front of the mirror
Solution
Final image (by lens) object I2
u = - 30, f = - 10
v =
= - 75∴ 2.5 cm in front of mirror.
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