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Newton's Colour Disc
Newton's Colour Disc (Product Code: SLE/PHY/261) is a hand-driven rotating disc carrying the spectral colours, used to show that white light is made up of all the colours of the spectrum in school optics lessons. Teachers turn a hand wheel that drives the 180mm diameter disc through a belt, and as it spins on its metal stand the colours appear to merge into a whitish shade. It is made by Jain Scientific Equipments Pvt Ltd (ScienceLab), an OEM manufacturer, at its own factory in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Disc diameter | 180mm |
| Disc | Multi-coloured, carrying the spectral colours |
| Drive | Belt drive from a hand-driven wheel |
| Mounting | Metal stand |
| Demonstrates | That white light may be composed from all the spectral colours, by rotation of the disc |
| Product code | SLE/PHY/261 |
| Manufacturer | Jain Scientific Equipments Pvt Ltd (ScienceLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is Newton's Colour Disc Used For?
Newton’s colour disc is the natural partner to prism dispersion. A prism splits white light into a band of colours; the disc does the reverse, recombining them. When it spins fast enough, the eye can no longer separate the coloured sectors (persistence of vision), so they blend into a pale, near-white colour. It is a quick, memorable addition to any optics experiment kit for school classes.
Show the disc at rest first so students can name the colours, then turn the wheel steadily and build up speed rather than jerking it. Bright, white room light gives the clearest effect. Use the moment to discuss why the spinning disc looks greyish-white rather than pure white: coloured surfaces reflect only part of the light that falls on them. Keep the belt free of oil so the drive does not slip.
OEM Manufacturer
Jain Scientific Equipments Private Limited trades as ScienceLab and is the OEM (original equipment manufacturer) of Newton’s Colour Disc, making it at its licensed factory at Saha, Ambala, Haryana, India. Schools, colleges, institutions, dealers and importers buy it factory-direct, and questions about a replacement belt or other spare parts go to the manufacturer itself — just ask us.
For institutional vendor registration, the company’s details are GSTIN 06AAECJ8618A1ZT and LEI 3358004HRD1JIVXKYX49. More background is on the ScienceLab profile.
Related Physics Lab Equipment
Pair the colour disc with these items for a complete lesson on white light and colour:
- Prism, Clear Glass — splits white light into the spectrum that the disc recombines
- Prism – Acrylic, Set of 7 — shapes for refraction and dispersion activities
- Raybox, 12V — a light source for dispersion experiments
- Electromagnetic Spectrum Chart — places the visible colours within the wider spectrum
See the complete Physics Lab Equipment category.
Frequently Asked Questions
What does Newton's Colour Disc demonstrate?
Newton’s Colour Disc demonstrates that white light may be composed from all the spectral colours. When the multi-coloured disc is spun quickly, the eye blends the colours together and the disc appears whitish, reversing the splitting seen with a prism.
How is Newton's Colour Disc rotated?
Newton’s Colour Disc is rotated by hand: a hand-driven wheel turns the disc through a belt. No electrical supply is involved, so it can be used in any classroom, and the teacher controls the speed directly by how fast the wheel is turned.
What size is the disc on Newton's Colour Disc?
The disc on Newton’s Colour Disc is 180mm in diameter and is mounted on a metal stand, giving a clear view for a group gathered round the teacher’s bench. In a large room, invite students forward in small groups so everyone sees the colours merge.
Why does Newton's Colour Disc look greyish-white instead of pure white?
Newton’s Colour Disc usually looks greyish-white because coloured surfaces are not pure spectral light: each sector reflects only part of the light falling on it. The blend is therefore duller than true white light, a useful discussion point for students.
Who manufactures Newton's Colour Disc?
Newton’s Colour Disc is manufactured by Jain Scientific Equipments Pvt Ltd (ScienceLab), the OEM, at its own licensed factory in Saha, Ambala, Haryana, India. The company supplies it directly to schools, dealers and importers in India and international markets.
What should I include in a quotation request for Newton's Colour Disc?
For a quotation on Newton’s Colour Disc, mention the product code SLE/PHY/261, the quantity required, any prisms or light sources you want quoted alongside, and the delivery location. Send it through the contact page or the enquiry cart.
Request a Quote
Newton’s Colour Disc is quoted directly by its manufacturer. Add it to the enquiry cart or reach the team through the contact page with your quantity and delivery details.
Last updated: 24 September 2026
