Question

A 10 cm object is placed perpendicular to the principle axis of a convex lens of focal length 12 cm . distance of object from the lens is 18 cm . find the nature, position and size of image formed ​

Answer 1

Is the answer v=36 cm

And height of image,=20 CM

Inverted and real,, enlarged ,,beyond 2f2

Answer 2

Stature of object= 10 cm Focal length = 12 cm

Object remove = - 18cm Image distance= ?cm

So, 1/v + 1/u = 1/f 1/v= 1/12-1/18 1/v=3/36-2/36 1/v=1/36 v=36cm

Now m=36/ - 18 m=-2 Nature of picture:-

1. image is virtual and erect.

2. it is shaped behind the focal point. 3.it is decreased in size. 4.it can't caught on screen.