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A concave mirror used for face viewing h...

A concave mirror used for face viewing has focal length of `0.4 m`. The distance at which you hold the mirror from your face in order to see your image upright with a magnification of 5 is ______ (in m).

A

0.24 m

B

0.16m

C

0.32 m

D

1.60m

Text Solution

Verified by Experts

The correct Answer is:
C
`m = (f)/( f - u) = 5 rArr (-40)/( - 40 - u) = 5`
`rArr 8 = 40 + u rArr u = - 32 cm = - 0.32 m`
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