engineering recuitment ICAR Technician 2021 Mock Test (Re-Exam) Physics Optics Refraction and Reflection
We combine two lenses, one is convex and another is concave having focal lengths f1 and f2. If the combination of lenses behaves like concave lens, then their combined focal length will be:
1
f1 > f2
2
f1 = f2
3
f1 < f2
4
None of these