Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Physics Optics Refraction and Reflection
A symmetrical biconvex lens of focal length 'f' is cut into four identical pieces along and perpendicular to its principal axis The focal length of each of four pieces is
1
4f
2
f / 4
3
2f
4
More than one of the above
5
None of the above