Question

object distance of concave mirror 45cm and image distance of the mirror 60cm find the focal length of the mirror?​

Answer 1

Answer:

For a concave mirror, we use the mirror formula

u

1

+

v

1

=

f

1

Now, given u=−60 cm , f=−24 cm

Putting the values in the expression,

v

1

=

24

−1

+

60

1

This gives, v=−40 cm

Now, for relating the velocities, we differentiate the mirror formula,to obtain,

u

2

−u

′

−

v

2

−v

′

= 0

Now, u

′

=9cm/s

Substituting these values, we get

3600

9

=−

1600

v

′

v

′

=−4 cm/s

Answer 2

Answer:

45+ 60=105

Explanation:

my phone is a great day of school and I have a great day of school and I have a great day of school and I