Quick Answer: The Primary Color Apparatus is a triple-lamp light box with red, green and blue sources, each with its own intensity potentiometer. Adjustable lens mounts converge the beams so the colours can be mixed.
Last updated: October 2026
Key Features
Independent red, green and blue lamps
Separate potentiometer for each colour’s intensity
Adjustable lens mounts for convergent beam control
Powder-coated metal, light-tight housing
Internal step-down transformer for AC input
Technical Specifications
Specification
Value
Light source
Triple lamp: red, green, blue
Controls
Independent intensity potentiometers
Optics
Adjustable lens mounts for convergent beams
Housing
Powder-coated metal alloy, light-tight
Power
AC input via internal step-down transformer
About This Product
Students converge the three beams and adjust each intensity to see how red, green and blue light combine into other colours. It is a hands-on way to teach additive colour mixing and the primary colours of light.
Frequently Asked Questions
Can each colour be dimmed separately on the Primary Color Apparatus?
Yes. The red, green and blue lamps each have an independent potentiometer for intensity control.
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