Question

14. When an object is placed at a distance of 15 cm from a concave mirror, its image is formed at 10 cm in front
of the mirror. Calculate the focal length of the mirror.​

Answer 1

Answer:

u = - 15 cm

v = - 10 cm

f = ?

1/v+ 1/u = 1/f

1/f = 1/-10 + 1/-15

1/f = 1/-10 - 1/15

1/f = -3 -2/30

1/f = -5/30

f = 30 /-5

f= -6 cm

Step-by-step explanation:

I hope it will help you!