This double-concave glass lens is made of polished optical glass, ensuring clarity and precision. Each lens measures 38mm in diameter and has a focal length of 15cm. Sold in a pack of 20 lenses, this set is perfect for a variety of optical experiments and educational purposes such as focal length measurements, sketching diverging lens and image formation, the effects of combination lenses, ray diagrams and lens behavior, and lens power calculations.
 
Features:
 
Polished Optical Glass: High-quality, polished for clear and accurate results.
Dimensions: Each lens measures 38mm in diameter.
Focal Length: 15cm focal length for precise focusing.
Pack Size: Sold in a pack of 20 lenses, ideal for classroom or lab settings.
Versatile Use: Suitable for a wide range of optical experiments and demonstrations.