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Question

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


Your Answer
A
+ 1
Your Answer
B
- 2
Correct Answer
C
+ 2
Your Answer
D
- 1

Solution

The correct option is D + 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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