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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).

Text Solution

Verified by Experts

`+5=-v/uimpliesv=-5u`
Using `1/v+1/u=1/f=1/(-5u)+1/u=(-1)/0.4`
`:.u=-0.32m`
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