Question

calculate the image distance if an object is placed 80cm from a concave mirror of focal length 30cm . Also calculate the magnification​

Answer 1

Answer:

3

Explanation:

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.

Answer 2

Answer:

your class which. hapter