A long vertical pin placed at 40 cm, in front of a concave mirror give – McqOptions

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1.	A long vertical pin placed at 40 cm, in front of a concave mirror gives an image at the same position. The focal length of the mirror in meters is
A.	0.2 m
B.	0.4 m
C.	0.6 m
D.	0.8 m
Answer» B. 0.4 m

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