JEE Main 2026 Physics question

Physics Experimental Skills JEE Main 2026

In parallax method for the determination of focal length of a concave mirror, the object should always be placed :

(1)between the focus (F) and the centre of curvature (C) of the mirror ONLY
(2)at any point beyond the focus F of the mirrorCorrect
(3)beyond the centre of the curvature ( C ) of the mirror ONLY
(4)between the pole ( P ) and the focus ( F ) of the concave mirror ONLY

Answer: (2)

Solution

Image should be real, so object should be placed beyond focus.

Question ID VK-001176