Question

You have a lens whose focal length is 5.51 cm. You place an object on the axis of the lens at a distance of 12.1 cm from it. How far is the object's image from the lens? image distance: If it can be determined, is the image real or virtual? O cannot be determined O virtual Oreal If it can be determined, is the image upright or inverted with respect to the object? cannot be determined inverted O upright

Answer 1

Here,

f = 5.51 cm

object distance, u = -12.1 cm

Using lens formula

1/f = 1/v - 1/u

1/5.51 = 1/v - 1/(-12.1)

v = 10.11 cm

the image distance is 10.11 cm

as the image distance is positive

hence , the image is real

and the image is inverted