Quick Answer: The Optical Bench Single Rod is an optics apparatus that lines up lenses, mirrors, screens, light sources and object pins along one optical axis for focal length and image formation practicals.
Last updated: October 2026
Key Features
Single-rod format keeps optical components on a straight line.
Components are mounted on sliding riders along the rod.
Used with convex and concave lenses, mirrors, object pins and screens.
Object and image distances are read from the bench scale.
Supports focal length, lens formula, image formation and magnification practicals.
About This Product
With the light source or object holder on one rider, the lens on a second and the screen on a third, students slide the riders until a sharp image appears on the screen. The object and image distances are then recorded and used to calculate focal length or verify the lens formula. Working on a single rod also shows students why optical alignment matters in these measurements. The Optical Bench Single Rod is available for supply within India and for export to New Zealand, Guyana, Moldova, Dominican Republic and Comoros.
Frequently Asked Questions
Q1. How is the focal length of a lens found on this bench? Move the riders until a sharp image forms on the screen, record the object and image distances from the bench scale and use them in the lens formula to calculate the focal length.
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