Question

find the size nature an position of image when the object of 5cm it's plays at the distance if 20cm from a concave mirror of focal length 10cm
​

Answer 1

Explanation:

Find the size, nature and position of image formed when an object of size 1cm is placed at a distance of 15 cm from a concave mirror of focal length 10cm?

Hard

Answer

u=−15cm

f=−10cm

h=1cm

From mirror formula

f

1

=

u

1

+

v

1

v

1

=

f

1

−

u

1

v

1

=

−10

1

−

−15

1

v=−30cm

The image is formed at a distance 30cm on the left side of the mirror from the pole.

m=

h

h

′

=

u

−v

h

′

=−1×

−15

−30

h=−2cm

The image size is 2cm and it is real and inverted.