A student places a luminous arrow 40 cm in front of a thin lens of unknown type
PHYSICS · Multi-part · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction
Problem
A student places a luminous arrow 40 cm in front of a thin lens of unknown type. The lens produces a sharp image that is inverted and half the height of the object on a screen located on the opposite side of the lens.
(a) Describe what the observed image characteristics imply about object, image, and focal positions.
(b) Explain and justify whether the lens is converging or diverging.
(c) Indicate the sign of the focal length under a standard sign convention and justify.