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in figure shown AB is a plane mirror of ...

in figure shown `AB` is a plane mirror of length `40cm`placed at a height `40cm`from grpund There is a light source`S`at a point on the ground ,Find the maximum and minimum height of a man(eye height)required to see the image of the source If he is standing at a point`A` on ground shown in figure.

Text Solution

Verified by Experts

The correct Answer is:
`160CM,320CM`

From the right triangle `SBN`and`BB'N'`
`(20)/(40)=(60)/(h_(min)-40)`
`h_(min)=12040,h_(min)=160cm`
from right angle triangle,`SAN"andAA'N'"`
`(20)/(80)=(60)/(h_(max)-80)rArrh_(max)-80=240^(@)`
`h_(max)=320cm`
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