Question

An object is kept at a distance of 4m in front of a sperical mirror which forms its erect image at a distance of 1.0m from the mirror. what is the magnification? is the mirror concave or convex

Answer 1

Answer:

Given:

u=4m

v=1m

m=-v/u

by sign convention, u=-4m

∴m=1/4

=0.2

as the magnification is positive and vitual and diminished hence the mirror could be convex .

Answer 2

Given ,

u=4m

v=1m

m=-v/u

by sign convention =-4m

m=1/4

=0.25 //

As the magnification is positive , virtual and diminished we can say that the mirror could be convex.

Hope its helpful.

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