Plane Glass Optical Slab
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Product Code : SCL-LAO-12087
Plane Glass Optical Slab (SKU SCL-LAO-12087) is a rectangular block of optical crown glass, 100 x 60 x 15 mm, for tracing the path of light through two parallel faces. It is the standard block for the Class 10 glass-slab refraction practical and for refractive-index and lateral-displacement work in Class 11–12 and B.Sc. labs. Science Lab Supplies makes the slab at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and delivers it to schools, colleges, contractors and distributors without a middleman.
Specifications
Below, the rectangular slab's details are broken out one per row. To summarise, it is a crown glass block with four polished edge faces, true 90° corners and small protective bevels, giving clean entry and exit boundaries for pin tracing or laser ray tracing on a sheet of paper.
| Specification | Value |
|---|---|
| SKU | SCL-LAO-12087 |
| Also known as | Rectangular glass slab; glass slab for physics lab |
| Geometry | Rectangular solid block |
| Material | High-transmittance optical crown glass |
| Length | 100 mm |
| Width | 60 mm |
| Thickness | 15 mm |
| Polished faces | Four lateral (edge) faces, polished to optical clarity |
| Top and bottom faces | Smooth |
| Edge geometry | True 90° vertical edges |
| Edge protection | Small safety bevels (chamfers) |
| Surface quality | 60/40 scratch-dig |
| Storage | Velvet-lined protective pouch |
| Instructions | Sheet with basic ray-tracing exercises |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Plane Glass Slab
Because its entry and exit faces are parallel, the slab bends a ray on the way in and reverses the bend on the way out, so the emergent ray runs parallel to the incident ray but shifted sideways. That makes it core school physics lab equipment in India for refraction practicals.
- Class 10 science: tracing the path of a ray through a rectangular glass slab for different angles of incidence, with pins such as the Optics Experiment Parallax Pin.
- Measuring lateral displacement and showing how it depends on slab thickness and angle of incidence.
- Class 11–12 and B.Sc. physics: finding the refractive index of crown glass from sin i / sin r, with a beam from the Rectangular Optical Light Box or pins.
Standard Scope of Supply
You receive one 100 x 60 x 15 mm crown glass slab, a velvet-lined protective pouch and an instruction sheet with basic ray-tracing exercises. Drawing pins, paper and any light source are separate items; they can be listed on the same quotation if the class needs a complete refraction set.
Packing, MOQ and Lead Time
Quotes are available for a single slab or for a full class set so that each student pair has its own block. Science Lab Supplies confirms the packing, delivery time and price for your quantity in writing, and pins or a ray box can be included on the same quote.
Science Lab Supplies holds an Importer-Exporter Code and can ship to buyers in the Philippines, Nepal, Bangladesh, Zambia, Rwanda and South Africa. A short note on the contact page or a line in the enquiry cart starts your quote, while bid documents belong on the lab tender page.
Frequently Asked Questions
Why does the slab shift the ray instead of turning it?
The entry and exit faces are parallel, so the bending at the first face is exactly undone at the second. The emergent ray leaves parallel to the incident ray, displaced sideways by an amount that depends on thickness and angle.
Which faces are polished?
The four long vertical edge faces are polished to optical clarity for light to enter and leave, while the wide top and bottom faces are smooth so the block lies flat on the tracing sheet.
Can it be used with a red or green laser pointer?
Yes. The crown glass transmits all visible laser wavelengths, so a pointer or laser ray box can replace pins. Never look into a laser aperture and keep such work under teacher supervision.
Is Science Lab Supplies the manufacturer or a trader?
Science Lab Supplies is the manufacturer. Its factory in Saha, Ambala produces the plane slab, so your price and delivery terms are quoted by the producer, with no trading company in between.
Related Glass Blocks, Prisms and Ray Kits
The following items extend the same refraction lessons to curved boundaries, prisms and laser ray tracing. Teachers can put any of them on one quotation with the rectangular slab to build a complete set for a school or college optics practical.
- Half-Round Optical Glass Slab — 90 mm semicircular block with a frosted base for critical-angle work.
- Glass Prism (Equilateral, 50 × 50 mm) — nominal refractive index 1.5170, for dispersion of white light.
- Prism Glass — equilateral prisms in 38 mm and 50 mm, plus 45-45-90 right-angle prisms.
- Ray Optics Laser Laboratory Kit — 1, 3 or 5 beam selector with a rectangular acrylic block.
- Laser Refraction Chamber Set — includes an equilateral prism with 75 mm sides.
- Raybox with Accessories — 12 V line-filament source with slit masks and a 75 mm plano-convex lens.
- Optical Ray Tracing Kit — five-beam laser ray box running from a 5V DC adapter.
Browse the full Light and Optics range, the Physics Lab range for school optics kits, or all physics lab equipment.
Last updated: 9 October 2026
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