Question

a Concave mirror is 30cm.
2, The focal length of
If a point of object is placed at a distance
40cm fdom a concove mirror then the distance of
image from the mirror is​

Answer 1

Answer:

Here, f = -30 cm, u = -40 cm

Image distance can be calculated as follows :

v

1

+

u

1

=

f

1

or,

v

1

−

40

1

=−

30

1

or,

v

1

=−

30

1

+

40

1

=

120

−4+3

=−

120

1

or, v=−120 cm

Magnification can be calculated as follows :

M=

u

v

=

−40

−120

=3

The positive sign with magnification show that image is real.