Question

Determine the focal length of a convex lens that produces a virtual image at the distance of 30mm when the object is placed 15mm away. Show all of your work for full marks.

Answer 1

Answer:

Given

Image distance, v=50cm

Object distance u=20cm

Since, the image is virtual it will be formed on the same side of the object.

From lens formula,

f1​=v1​−u1​

f1​=−501​−−201​

=1003​

f=3100​cm= focal length

Step-by-step explanation: