Newton’s Colour Disc Model
Product Code : SCL-LAO-11215
Quick answer: Newton's colour disc model is a disc painted with the seven spectrum colours (VIBGYOR) that is spun fast by a hand-driven pulley and belt. At speed the colours blend through persistence of vision and the disc looks nearly white, showing that white light is a mixture of colours. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Component | Specification |
|---|---|
| Disc | Seven coloured sectors of the visible spectrum (VIBGYOR) |
| Drive | Manual hand pulley with crank handle and rubber drive belt |
| Pillar / support | Heavy-duty steel, powder-coated |
| Base | Cast iron with non-slip paint finish |
| Power | None required (purely mechanical) |
Disc diameter, overall dimensions and weight are confirmed with the quotation.
How the model is used in teaching
Newton showed with a prism that white light splits into a spectrum of colours. The colour disc demonstrates the reverse: the eye retains each image for roughly one-sixteenth of a second (persistence of vision), so once the seven sectors pass the eye faster than that, their colours overlap on the retina and the disc appears whitish.
- Stand the model on a firm, level bench with the belt seated in both pulley grooves.
- Show the class the stationary disc and name the seven sectors in order.
- Turn the crank steadily, increasing speed until the separate colours can no longer be seen.
- Ask students to describe the colour of the spinning disc, then slow down and watch the sectors reappear.
Because paints are not pure spectral colours, the spinning disc usually looks off-white or light grey rather than brilliant white. This makes a good discussion point on the difference between mixing light and mixing pigments.
Key features
- Seven sectors in spectral order: red, orange, yellow, green, blue, indigo and violet.
- High-ratio pulley and belt drive lets a student reach blending speed with a few turns of the crank.
- Cast iron base keeps the centre of gravity low, so the model stays steady while spinning.
- Powder-coated steel pillar holds the disc and pulley assembly rigidly.
- No batteries or mains supply needed, so it can be used in any classroom.
What is included
- Newton's colour disc
- Cast iron base with steel supporting pillar
- Hand-driven pulley wheel assembly
- Rubber drive belt
- Practical instruction guide
Documentation and supply
A practical instruction guide is supplied with the model. Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the Newton's colour disc model at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
Related Light and Optics products
- Optical Needle / Parallax (SCL-LAO-11216)
- Magnifier Glass 3" (SCL-LAO-11225)
- Ray Optics Kit (SCL-LAO-11229)
- Convex Lens (SCL-LAO-11234)
- Concave Lens (SCL-LAO-11235)
- Concave Mirror (SCL-LAO-11236)
The full range is in the Light and Optics section of the Physics Lab range.
Frequently asked questions
What does Newton's colour disc demonstrate?
It shows that white light is made of the seven spectrum colours: when the disc spins fast, persistence of vision blends the sectors and the disc looks nearly white.
Does the colour disc model need electricity?
No. It is turned by hand through a pulley and rubber belt, so no power supply or batteries are required.
What is the price of the Newton's colour disc model?
Prices are not published on the website. Add the Newton's colour disc model to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code SCL-LAO-11215 and the quantity, to receive a quotation.
Does Lab Exports manufacture the Newton's colour disc model?
Yes. Lab Exports manufactures the Newton's colour disc model at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code SCL-LAO-11215.
Request a quote
Email [email protected] with the house code SCL-LAO-11215 and the quantity, or add the Newton's colour disc model to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
