Q

What is the sign of the focal length for a convex lens as per the sign convention for spherical lenses?

RRB JE 25/02/2026 / 4:30 PM - 6:00 PM 2026
✓ Answer: D Positive
When light passes from a rarer medium to a denser medium obliquely, its speed decreases and the ray bends towards the normal.
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