Question

an object is placed in front of a concave mirror of radius of curvature 40cm at the distance of 10 cm find the position nature and magnification of image

Answer 1

Answer:

Given

_______

R=-40cm

f=-20cm

u=-10cm

To find

________

v=?

m=?

Solution

__________

We know that,

1/f=1/v+1/u

=>1/v=1/f-1/u

=>1/v=1/-20-1/-10

=>1/v=-1+2/20

=>1/v=1/20

v=20 cm

m=-v/u

=>m= -20/-10

=>m=2

Hence, the image will be placed at 20 cm

behind the mirror and will be twice in size.

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