Question

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

Answer 1

SOLUTION:-

$v=14.28cm\\h1=7.14cm\\image\:formed\:is\:virtual\:and\:erect\\also \:diminished \: (because\:of\:it's\:positive\:sign)$

GIVEN:-

• spherical, polished metallic ball is used as a diverging mirror (f = +20 cm)

• bird, 25 cm tall, standing perpendicular

• 50 cm away, looks directly at the mirror

TO FIND:-

• the size (v)

• position of the bird's image ($hi$)

THINGS ASSUMED:-

$f=20cm\\ho=25cm\\u=-50cm$

SOLUTION:-

whole solution is in the pic that i have attached

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