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Question

In figure find the total magnification after two successive reflections first on M1 and then on M2.

A
+ 1
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B
- 2
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C
+ 2
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D
- 1
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Solution

The correct option is C + 2
For M1,

1v+1u=1f
1v130=120
v=60 cm


For M2,
1v120=110
v=60 cm

Net magnification
M=vu=6030=2

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