A object is placed 90 cm away from concave mirror of focal length 30cm .find position and Nature of image
u = -90 cm
f = 30 cm
Mirror formula 1f = 1u + 1v
1v = 1f – 1u
1v = 130 + 190
v = 22.5 cm
Image is formed at a distance of 22.5 cm from the pole behind the mirror.