Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

A 5 cm tall object is placed perpendicular to the principle axis of a convex lens of focal length 12 cm. The distance of the object from the lens is 8 cm.

Using the lens formula, find the position, size and nature of the image formed.


u = −8 cm f = 12 cm h = 5 cm
Now lens formula is 
1/u + 1/v = 1/f.
Putting Values
Thus, image is formed 24 cm on the left of convex lens i.e. on the side of the object.h′ = 15 cm (Positive)
The height of the image is 15 cm which is 3 times larger than the height of object.Thus, we can say image is virtual, enlarged and erect.
0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts