Quick Answer: The Punctiform Lamp is a compact point-form light source for optics experiments, used to show straight-line propagation of light and sharp shadow formation. It also serves reflection, refraction and image formation work with lenses, mirrors and prisms.
Last updated: October 2026
Key Features
Point-like light source for geometrical optics
Gives sharp shadows for studying umbra, penumbra and straight-line propagation
Used with lenses, mirrors, prisms, filters, optical bodies and screens
Can be aligned on an optical bench with screens and lens holders
About This Product
A small, point-like source casts shadows with sharp edges, so students can see clearly why light travelling in straight lines produces an umbra and when a penumbra appears. Placed on an optical bench, it also serves as the source for mirror and lens experiments.
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