Quick Answer: Physics Demonstration Convex Mirror is an outward-curved mirror for showing divergent reflection, the virtual focus behind the mirror and the virtual, upright, diminished image of a real object.
Last updated: October 2026
Key Features
Convex spherical reflecting surface
Parallel rays spread after reflection and appear to come from a virtual focus
Negative focal length under the standard Cartesian sign convention
Explains the wider field of view compared with a similar plane mirror
Technical Specifications
Specification
Value
Reflective profile
Convex spherical surface
Image of a real object
Virtual, upright, diminished
Focal-length sign
Negative (Cartesian sign convention)
About This Product
Narrow rays aimed at the convex face are traced as they diverge and extended backwards to find the virtual focus; an object placed in front then shows the reduced image. Teachers use it in Light And Optics to compare convex, concave and plane mirrors.
Frequently Asked Questions
Q1. Why is a convex mirror called a diverging mirror? Parallel incident rays spread apart after reflection and appear to originate from a virtual focal point behind the mirror.
Q2. What image does it form? For a real object, a virtual, upright and diminished image behind the reflecting surface.
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