Rectangular Optical Grade Glass Slab

Quick answer: The LabEquip Rectangular Optical Grade Glass Slab is a transparent laboratory component with two parallel faces, used to demonstrate refraction and lateral displacement of light. It lets students trace light rays, verify Snell’s law, and study how the angle of incidence relates to the sideways displacement of the emergent ray – suitable for secondary-school, college and university physics labs.

Product Description

This slab provides two opposite, nominally parallel faces for ray-optics experiments. When a light ray enters the slab obliquely, it bends toward the normal, travels through the glass, and bends away from the normal again as it exits into air on the far side.

Because the entry and exit faces are parallel, the emergent ray remains parallel to the incident ray but is laterally displaced – a key result students measure and verify experimentally. The exact optical-glass grade, refractive index, dimensions, thickness and surface-quality specification are not confirmed in this listing, so we have not invented these values. Please verify these specifics with our sales team before you order.

Specifications

Suggested Procedure

• Place the slab on plain paper and outline its edges lightly in pencil.
• Direct a narrow light ray at the slab at a chosen angle of incidence.
• Mark the incident ray, the points where it enters and exits the slab, and the emergent ray.
• Remove the slab and join the marked points to draw the complete ray path.
• Measure the angles of incidence, refraction and emergence, and the lateral displacement, then repeat at different angles.

Safety Note

Handle the glass slab carefully; its edges may be sharp and it can chip or crack if dropped. Never look directly into the light source used for the experiment.

Care & Maintenance

• Clean the slab surfaces with a soft, lint-free cloth; avoid abrasive materials.
• Store the slab flat in a padded case to prevent chipping of the edges.
• Inspect the slab for cracks or chips before each use and discontinue use if damaged.

Why Choose LabEquip

LabEquip (The Lab Equipment Pvt Ltd) supplies physics, chemistry, biology and STEM laboratory equipment to schools, colleges and training institutes. Pair this slab with our Ray Optics Kit or Optical Alignment Pin for a complete refraction-study setup, or see our Laser Optics Experiment Tank Kit for broader ray-optics work. Visit our homepage to browse the full physics lab equipment range, and ask our sales team to confirm the exact glass grade before you order.

Frequently Asked Questions

What does the Rectangular Optical Grade Glass Slab demonstrate?

It demonstrates refraction of light, Snell’s law, and lateral displacement of a ray passing through a slab with two parallel faces.

Why is the emergent ray parallel to the incident ray?

Because the slab’s entry and exit faces are parallel, the ray bends by equal and opposite amounts at each face, so the emergent ray ends up parallel to the incident ray, just shifted sideways (laterally displaced).

What is the refractive index of this glass slab?

The refractive index and exact glass grade are not stated in this listing, so we have not invented a figure. Please confirm with our sales team before a quantitative experiment.

How should I clean and store the glass slab?

Clean the surfaces with a soft, lint-free cloth, avoid abrasive materials, and store the slab flat in a padded case to prevent chipping of the edges.

Last Updated: September 2026