Question

The image of an object placed 16 cm from a concave
mirror is formed at a distance of 24 cm from the
mirror. Calculate the possible focal lengths of the
concave mirror from this information.​

Answer 1

Answer:

9.6 cm

Explanation:

$mirrror \: formula \\ \frac{1}{f} = \frac{1}{v} + \frac{1}{u} \\ (v \: and \: u \: put \: with \: sign) \\ \frac{1}{f} = \frac{1}{ - 24} + \frac{1}{ - 16} \\ \frac{1}{f} = - \frac{1}{24} - \frac{1}{16} \\ f = - ( \frac{16 \times 24}{24 + 16} ) \\ f = - \frac{16 \times 24}{40} \\ f = - 9.6cm$