Question

A spherical polished metallic ball is used as a diverging mirror f=-20cm over a birdbath. A bird 25cm tall, standing 50 cm away looks directly at the mirror what are the size and position of bird image?​

Answer 1

HEYA MATE, HERE IS UR ANSWER

<b><i>=5 cm

H'=10 cm (image is virtual)

The image is enlarged, so the mirror used is Concave mirror. Convex mirror never has an enlarged image.

U=-20 cm (placed before the mirror )

M=\frac {H'}{H}

M=\frac{10}{5}

M=+2

M=\frac {-V}{U}

2=\frac {-V}{-20}

By cross multiplication

2×-20=-v

-40=-v

v=40 cm

Position of the image =40 cm behind the mirror

Using mirror formula