Question

a
(al Three students measured the focal length
of a Convex lens uring paralld rays
I from a distant object. All of them.
Imeasured the distance as given
Student A distance b/w leurs & screen
Student B: distance b/w dject & screen
student C: distance bo object flense
which student gets the correct focal
length of lens?
(a shident A only. (6.) Students B & C both
Students A & B both. & Student Conly​

Answer 1

Answer:

A only. The focal length of a lens is always measured from the lens to screen