Plane Glass Optical Slab

Product Code : SCL-LAO-12087

The Glass Slab for Physics Lab is a high-transmittance rectangular optical block used for demonstrating the refraction of light rays passing through different media. Designed for physics students and educators, this essential component provides a clear, physical method to trace light paths, measure lateral displacement, and calculate the refractive index of glass.

Product Description

This rectangular glass block provides a highly reliable, flat optical medium for entry-level and advanced geometric optics experiments. Fabricated using high-purity crown glass, the slab maintains a uniform refractive index across its entire volume to eliminate structural beam distortion. All four lateral faces are precision-ground and polished to optical clarity, allowing student lab groups to trace incident, refracted, and emergent rays easily with standard ray pins or lasers.

For secondary schools and universities updating their standard inventory of , this apparatus offers exceptional long-term didactic value. It transforms abstract wave-bending mathematics into highly visible, physical paths on a student's tracking chart. The highly durable silicate glass structure is built to withstand repeated cleanings and frequent classroom handling without developing cloudiness or internal yellowing over time.

Key Features

• High-Transmission Crown Glass: Fabricated from premium optical silicate glass to guarantee maximum beam transmission and minimal internal bubble flaws.
• Optically Polished Sides: Features four precision-polished boundary faces to produce exceptionally sharp ray tracking lines during laser operations.
• Shatter-Resistant Edge Chamfers: Designed with microscopic protective safety bevels to protect student hands and minimize structural corner chipping.
• Perpendicular Geometry Alignment: Machined with true $90^\circ$ vertical edges to ensure predictable physical ray entrance and exit boundaries.
• Scratch-Resistant Surface: Hard silicate glass structure provides superior resistance against scratching from drawing compasses and metal tracking pins.

Technical Specifications

What's Included in the Kit

• 1 x Glass Slab for Physics Lab optical block
• 1 x Velvet-lined protective storage pouch
• 1 x Product instruction sheet with basic ray tracing exercises

Applications / Uses

• Tracing light paths through parallel boundaries to visually demonstrate light refraction laws.
• Determining the specific refractive index of crown glass by calculating the ratio of the sine of the angle of incidence to the sine of the angle of refraction using Snell's equation:
• Measuring the exact lateral displacement of an emergent light ray as a function of block thickness via the geometric formula:
• Serving as a fundamental component inside a modular to investigate total internal reflection thresholds.

How to Use the Glass Slab for Physics Lab

1. Place a white drawing paper sheet flatly on a level physics laboratory workbench table.
2. Set the Glass Slab for Physics Lab down onto the center of the paper tracking mat.
3. Trace the rectangular perimeter outline of the glass block accurately using a sharp pencil.
4. Push two alignment tracking pins vertically into the paper along a chosen oblique path to establish the incident ray line.
5. Look horizontally through the opposite polished face of the slab and insert two additional pins so they appear perfectly aligned with the first two.
6. Remove the glass block and use a straightedge ruler to link the pin coordinates, mapping out the entry, internal, and emergent ray trajectories.

Safety Note: Handle the glass block with caution; do not strike the corners against hard stone workbenches to prevent accidental fragmentation or chipping.

Care & Maintenance

• Cleaning: Clean the polished faces gently using a lint-free microfiber cloth and standard optical lens fluid; avoid paper products that cause microscopic scratches.
• Storage: Always slide the glass element inside its velvet-lined protective pouch before placing it in an equipment bin to prevent abrasive glass-to-metal contact.
• Handling: Hold the optical slab exclusively by its upper and lower frosted margins to keep fingerprints from smudging the active ray tracking windows.

Why Choose Science Lab Supplies

Science Lab Supplies is an established manufacturer and premier global exporter of robust laboratory instruments and classroom experiment setups. Drawing on decades of technical production experience, we configure specialized laboratory apparatuses that safely withstand heavy institutional use. Our operational facilities enforce strict quality assurance protocols to guarantee true geometric alignment across all product lines. With our advanced international logistics networks, we efficiently manage safe bulk deliveries to universities and school boards worldwide.

Frequently Asked Questions

What is the advantage of using glass over acrylic for a refraction slab?

Glass features superior optical purity, a highly stable refractive index, and excellent long-term scratch resistance, whereas acrylic blocks scratch easily and can warp under UV light exposure over time.

What are the exact dimensions of this glass slab?

The standard model features a structural measurement of 100 mm in length, 60 mm in width, and 15 mm in thickness, providing a stable footprint for tabletop tracing.

Can this block be used with standard green or red laser pointers?

Yes, the high-transmittance crown glass is perfectly optimized to carry all visible laser wavelengths cleanly without diffuse internal light scattering.

Why does a glass slab cause lateral displacement rather than angular deviation?

Because the entry and exit faces are perfectly parallel, the angular bending that occurs when light enters the glass is exactly reversed when it exits, resulting in an emergent ray that is parallel to the incident ray but shifted to the side.

Is the top of the glass slab frosted or clear?

The two main wide faces (top and bottom) are smooth, while the four long vertical edge tracks are polished to high optical clarity to facilitate clear light entry and tracking.

Explore our full online catalog to discover matching optical didactic models for your school's physics department, or contact our customer support desk today to finalize a wholesale quotation.