Biconcave Glass Lenses – 38mm Diameter, 150mm Focal Length (Set of 20)

This high‑quality Set of 20 Biconcave Glass Lenses is perfect for school physics lessons, optical demonstrations, and practical explorations of light divergence and lens behaviour. Each lens is manufactured from spherical, optically true worked glass, offering excellent clarity and precision for reliable day‑to‑day use in the classroom.

Designed with highly polished, ground edges, the lenses provide both accuracy and safety, making them ideal for frequent handling by students. With a 38mm diameter and a 150mm focal length (FL), these biconcave lenses are perfectly suited for teaching how light rays spread out, as well as for exploring ray diagrams and optical calculations.

Key Features

• Pack of 20 biconcave glass lenses
• Made from optically true, spherical worked glass
• Highly polished and ground edges for clarity and student safety
• 38mm diameter for easy handling and compatibility with ray boxes
• 150mm focal length – ideal for divergence and ray‑tracing work
• Durable construction for repeated school laboratory use
• Suitable for KS3, GCSE, and A‑Level physics lessons

Ideal for School Science Lessons

These biconcave lenses are excellent for developing student understanding of light behaviour across KS3, GCSE, and A‑Level physics. They are ideal for:

• Demonstrating divergence of light rays through concave lenses
• Teaching ray diagrams and the behaviour of virtual images
• Investigating focal length and its role in optical systems
• Supporting practical lessons on lens combinations and optical correction
• Enhancing hands‑on optics activities and STEM projects

Durable, precise, and ready for classroom use, this set of biconcave lenses provides a reliable and engaging resource for teaching key principles of optics and the behaviour of light.