Question

1 ) An object is placed 20 cm in front of a convex mirror of focal length 30 cm . Find the position , nature and size of the image ? 2 ) An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm Find the position , nature and size of the image ?

Answer 1

Answer:

Given, f=20cm,u=−20cm,v=?

As,

f

1

=

v

1

+

u

1

v

1

=

f

1

−

u

1

v

1

=

20

1

+

20

1

v

1

=

20

2

v=10cm

So, the distance of the image from the pole of the mirror is 10cm.

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Answer 2

Answer:

Given,

1/v+1/u=1/f

I don no