Quick Answer:The Reflection of Light Apparatus is a protractor base with a plane mirror held upright on a bracket and a marked normal line, used with a single-slit ray box or laser pointer to measure angles of incidence and reflection.
Last updated: 18 October 2026
Key Features
Plane mirror on a vertical mounting bracket.
Circular protractor scale, 0–360° or 0–180°.
Normal line marked at 90° as the reference.
Non-reflective polymer or wooden base.
Designed for use with a single-slit ray box or laser pointer.
Technical Specifications
Specification
Value
Base
Non-reflective polymer or wood
Mirror
Plane mirror on vertical bracket
Scale
Circular protractor, 0–360° or 0–180°
Reference
Normal line at 90°
Light source
Single-slit ray box or laser pointer
How It Is Used
A narrow ray is aimed at the centre of the mirror at a chosen angle to the normal, and the reflected ray is read off the scale. Repeating for several angles shows that the angle of incidence always equals the angle of reflection.
Frequently Asked Questions
What light source is used with the Reflection of Light Apparatus?
It is designed for a single-slit ray box or a laser pointer, aimed at the mirror so the incident and reflected rays can be read on the protractor scale.
