Adjustable Double Slit Interference Apparatus
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Product Code : SCL-LAO-12061
Adjustable Double Slit Interference Apparatus (SKU SCL-LAO-12061) is a Young’s double slit unit whose slit width and slit separation are both set by micrometer screws, so students can move from simply seeing fringes to measuring the wavelength of light. It is built for undergraduate and senior school wave-optics practicals on a standard optical bench. Science Lab Supplies manufactures the apparatus at its Saha, Ambala factory (Plot 448, HSIIDC Industrial Area, India) and quotes it directly to colleges, schools, tender contractors and distributors.
Specifications
The table gives each figure for the micrometer-adjusted double slit. In short, etched slits on optical glass sit in a black anodised aluminium housing; two micrometers set slit width from 0.05 to 0.50 mm and separation from 0.20 to 2.00 mm, and a 10 mm stainless steel rod fits standard optical benches.
| Specification | Value |
|---|---|
| SKU | SCL-LAO-12061 |
| Slit width range | 0.05 mm to 0.50 mm |
| Slit separation range | 0.20 mm to 2.00 mm |
| Adjustment mechanism | Dual precision micrometer screws |
| Micrometer reading | Calibrated scales in 0.01 mm increments |
| Slits | Precision-etched on optical-grade glass |
| Housing material | Black anodised aluminium and optical glass |
| Mounting rod | 10 mm diameter stainless steel |
| Bench fit | Standard optical benches with 10 mm rod holders |
| Compatible sources | Monochromatic lasers and light sources, e.g. red, green or blue diode or gas lasers |
| Single slit mode | By closing or obscuring one slit |
| Storage | Protective storage case |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Adjustable Double Slit
With a laser shining through the slits and fringes caught on a screen, students measure fringe width and calculate wavelength, then change slit width or separation and watch the pattern respond. The apparatus suits B.Sc. and B.Tech wave-optics practicals and Class 12 demonstrations of Young’s experiment.
- Class 12 wave optics: Young’s double slit fringes, recorded on a Laboratory White Viewing Screen with its 1 mm grid.
- B.Sc. practical: wavelength of a diode or helium-neon laser from fringe width, slit separation and screen distance.
- Varying slit width and separation to study the diffraction envelope and spatial coherence.
- Single-slit diffraction with one slit closed, aligned on an Optical Bench Full Shaper 1 Meter.
Never look into a laser beam or its direct reflection; use eye protection suited to the laser and follow your laboratory’s laser safety rules. Do not force the micrometers past their limits.
Standard Scope of Supply
Each kit contains the adjustable double slit assembly, a heavy-duty 10 mm mounting post, a protective storage case and an instructional guide with sample laboratory experiments. A laser or other monochromatic source, a viewing screen and an optical bench are not included and can be quoted separately.
Packing, MOQ and Lead Time
One unit for a demonstration or several for parallel practical benches can be quoted. Science Lab Supplies lists the packing, delivery time and price for the requested quantity on every quotation, and a screen, bench or light source can share the same quote.
As a holder of an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Uganda, the UAE, Saudi Arabia, Oman, the Philippines and Nepal. To set up an interference bench, ask through the contact page, collect parts in the enquiry cart, or quote it against a tender from the lab tender page.
Frequently Asked Questions
Which light sources work with the Adjustable Double Slit Interference Apparatus?
Most monochromatic lasers and light sources can be used, including red, green and blue diode or gas lasers. The source is a separate item and can be quoted with the apparatus.
Can it show single slit diffraction?
Yes. Close or obscure one slit with the micrometer and the remaining slit produces a standard single-slit diffraction pattern, which can then be compared with the double-slit fringes.
How finely can slit width and separation be set?
The micrometer scales read in 0.01 mm increments. Slit width can be set between 0.05 and 0.50 mm and slit separation between 0.20 and 2.00 mm.
Is this apparatus made by Science Lab Supplies?
It is. Science Lab Supplies manufactures the double slit unit in Saha, Ambala, India, and every quotation for it is issued by the manufacturer itself, without a distributor adding a layer in between.
Related Interference and Wave Optics Apparatus
These items complete an interference and diffraction bench: Newton’s rings for thin-film work, a teacher’s laser kit, gratings, a wave-optics set, a spectrometer and a bench for mounting, and any of them can be added to the double slit on one quotation.
- Newton's Ring Apparatus — plano-convex lens on a flat glass plate, pressure set by three thumbscrews.
- Diffraction and Interference Study Kit - Teacher's Demonstration Model — ringed Young’s slit and diffraction-hole tokens with a red and green multibeam laser.
- Diffraction Gratings with Holder — three gratings of 100, 300 and 600 lines/mm between glass plates.
- Optics Set OW1, Wave Optics — materials for 14 wave-optics experiments in a case with a hinged handle.
- Laboratory Spectrometer — collimator with adjustable slit, prism table and grating holder mount.
- Optical Bench Ordinary Physics Lab — 1000 mm twin-rail bench whose riders accept 10 mm stems.
Browse the full Light and Optics range, the Physics Lab range for wave-optics kits, or all physics lab equipment.
Last updated: 9 October 2026
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