1.

An object 5.0 cm in length is placed at a distance of 20 cm in front of a convex mirror of radius of curgature 30 cm. Find the position of the image, its nature and size.

Answer»

Solution :`h_(1)=-5CM, U--20cm, R=30cm`
`v=?,h_(2)=?`
`f=R/2=30/2=15cm`
`1/f=1/v+1/u`
`v=(UF)/(u-f)=(-300)/(-35)`
`v=60/7=8.57cm`
`m=(h_(2))/(h_(1))=-v/u`
`h_(2)=15/7=2.14cm`


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