Quick Answer: Educational Concave Lens Element is a diverging lens for showing how parallel rays spread after passing through a concave lens, with a negative focal length and a virtual focus.
Last updated: October 2026
Key Features
Diverging action; thinner at the optical centre than at the edges
Negative focal length under the standard Cartesian sign convention
Forms a virtual, upright, diminished image of a real object
Fits a correctly sized holder or optical-bench carrier; needs no power
Technical Specifications
Specification
Value
Lens action
Diverging
Lens profile
Concave
Focal-length sign
Negative (Cartesian sign convention)
About This Product
Parallel or narrow rays sent through the lens are traced as they diverge and then extended backwards to locate the virtual focus, which students compare with a convex lens in the same set-up. The element is used in Light And Optics with ray boxes, optical benches and classroom demonstrations.
Frequently Asked Questions
Q1. What image does a concave lens form? For a real object, an isolated concave lens normally forms a virtual, upright and diminished image.
Q2. Does it converge or diverge light? It diverges parallel incident rays, which then appear to come from a virtual focal point on the incident-light side.
Lab Equipments Ambala exports to schools, colleges and distributors in countries such as Tanzania, Mali and Timor-Leste.
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