The Ibex Sciences Rectangular Glass Slab is a highly transparent optical physics apparatus used in student laboratories to demonstrate how light bends. It is primarily used in Matric, Intermediate, and O/A-Level science labs across Pakistan to calculate the refractive index of glass and observe optical displacement. [1, 2, 3, 4, 5]
Key Product Specifications
- Material: Optically clear, bubble-free English or plate glass with perfectly parallel faces.
- Edges: Smooth, flat-ground, and highly polished to ensure safe student handling and distortion-free paths.
- Standard Dimensions: Typically available in sizes like 75 x 50 x 12 mm or 75 x 50 x 18 mm.
- Refractive Index: Features a standard refractive index of approximately 1.5. [1, 2, 3, 4, 5]
Core Laboratory Uses
- Refraction Experiments: Demonstrates how light rays bend when moving from air (less dense) into glass (more dense).
- Lateral Displacement: Shows how an emerging light ray shifts sideways while remaining parallel to the original entry ray.
- Snell’s Law Verification: Used alongside drawing boards and pins to measure and prove that \(\frac{\sin(i)}{\sin(r)} = \text{constant}\).
- Real vs. Apparent Depth: Used to measure the optical thickness of materials by looking at underlying marks through the glass. [1, 2, 3, 4, 5, 6]
Care and Maintenance
- Avoid Scratches: Never drag the slab across rough surfaces; always place it flat onto paper sheets.
- Cleaning: Wipe fingerprints away using a microfiber cloth and a drop of basic glass cleaner.
- Storage: Pack the glass slabs inside dedicated padded divider boxes to prevent chipping or cracking. [1]





















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