Newton's Ring Apparatus Manufacturer,Supplier and Exporter in India
Product Code : ILS-LAO-10817
Indian Lab Suppliers supplies the Newton's Ring Apparatus (Product ID: 10817) as part of its light and optics range. It holds a plano-convex lens against a flat glass plate to produce Newton’s rings.
Quick Answer
The thin film of air between the curved lens and the flat plate produces concentric interference rings, with a dark centre in reflected light. Three thumbscrews in the plastic frame adjust the contact pressure, which centres and steadies the pattern. With monochromatic light and a travelling microscope, students measure ring diameters and use Dn+m² − Dn² = 4mλR to find the wavelength λ or the lens radius of curvature R. Lens diameter and focal length are not stated; please confirm them at quotation.
Key Specifications
| Parameter | Detail |
|---|---|
| Optics | Plano-convex lens on a flat glass plate |
| Frame | Plastic |
| Adjustment | Three thumbscrews for contact pressure |
Where This Is Used
Set up with a sodium lamp powered by a Sodium Lamp Transformer 35W (Product ID: 14598) and read with a Travelling Microscope (Product ID: 14615); the lens curvature can be cross-checked with a Spherometer (Product ID: 14616). Browse the full Light and Optics range or related Physics Lab Equipment products.
Frequently Asked Questions
What causes the rings?
Interference in the thin air film between the lens and the plate.
What are the thumbscrews for?
They adjust the pressure between the lens and the plate.
What can be measured?
The wavelength of light or the radius of curvature of the lens.
Related Categories
Light and Optics · Physics Lab Equipment · Wave Motion
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