【To all users】

• Double-concave lens that has been manufactured by grinding and then polished, so that its surface minimizes distortion.
• Glass or conventional plastic lenses allow no direct observation of light rays passing through them. In contrast, this product made of special acrylic clearly visualizes the light rays passing through it and allows direct observation of light rays traveling inside.

【To teachers】

• Less efforts required to explain to students about how light ray travels, because they cannot only observe how light ray is reflected from, refracted into, and refracted out of the lens, but also can directly observe how light ray passes through the lens.

【To students】

• Easy to understand the nature of light ray by observing and tracking its entire traveling path that is refracted into, passes through and is refracted out of the lens.

• Material: High-quality smoked acrylic (pat. pend.)
• Size: 76 x 25mm
• Focal length of lens: ca. -100mm