Question

an object is placed 20cm and 30cm distance from concave mirror with the focal length 25cm.find characteristics of the image?​

Answer 1

Answer:

u= -30 cm

f= -20 cm

By using mirror formula,

1/v + 1/u = 1/f

1/v + 1/-30 = 1/-20

v= -60 cm

negative sign indicates that image is in front of the mirror

Therefore,

The distance between image and object = 60–30 = 30cm

I hope it will help you