7-909-21 Double Concave Lens 50mm d. x 10 cm. F.L.

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US$2.31
7-909-21
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These superior quality unmounted Double Concave Lenses with ground edges are useful for teaching a variety of optical principles.

 

Order# Description
 7-909-8  38mm d. x 10 cm. F.L.
 7-909-9  38mm d. x 15 cm. F.L
 7-909-10  38mm d. x 20 cm. F.L.
 7-909-11  50mm d. x 20 cm. F.L.
 7-909-21  50mm d. x 10 cm. F.L.
 7-909-22  50mm d. x 15 cm. F.L.
 7-909-12  75mm d. x 20 cm. F.L.

Double Concave Lenses have two inwardly curved surfaces, a negative focal length, and are often used to aid in the distribution of light as well as image reduction.