Acrylic Bi‑Concave Lens Block – 75mm × 100mm Radius

This high‑quality Acrylic Bi‑Concave Block (75mm length with a 100mm radius) is a precision‑crafted optical component ideal for exploring the behaviour of diverging lenses. Made from durable, optically clear acrylic, it provides excellent visibility of light rays and paths, making it an essential tool for hands‑on optics investigations in the classroom.

The block’s bi‑concave curvature causes parallel light rays to diverge, providing clear and demonstrable results when used with ray boxes or LED sources. Its lightweight and shatter‑resistant design makes it a safe and practical alternative to glass lenses, perfect for repeated use in busy educational settings.

Key Features

• High‑clarity acrylic construction for excellent optical performance
• Bi‑concave lens shape (75mm long, 100mm radius) for diverging‑ray experiments
• Lightweight and classroom‑safe compared to glass alternatives
• Durable, impact‑resistant design for long‑term use
• Ideal for demonstrating image formation and light divergence

Ideal for School Science Lessons

Perfect for KS3, GCSE, and A‑Level physics, this bi‑concave acrylic block is ideal for teaching fundamental optics topics such as light divergence, lens behaviour, and ray tracing. When used with a ray box, it clearly demonstrates how concave lenses spread out incoming light rays.

• Explore diverging lenses and how they affect light rays
• Teach ray diagrams and principles of image formation
• Investigate refractive index and bending of light
• Great for practical lessons using ray boxes or LED light sources
• Safe for students to handle during experiments

Durable, clear, and highly effective for teaching optics, the 75mm Bi‑Concave Acrylic Block is a valuable addition to any school science department.