LIGHT/OPTICS |
LENSES: DOUBLE CONCAVE (BI-CONCAVE) Spherical.
Highly polished and well edged made from plate glass.
Focal Length cm |
Dia - 38mm |
Dia - 50mm |
Dia - 60mm |
Dia - 75mm |
Dia - 100mm |
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DOUBLE CONVEX (BI - CONVEX) Spherical
Highly polished and well edged made from plate glass.
Focal Length cm |
Dia - 38mm |
Dia - 50mm |
Dia - 60mm |
Dia - 75mm |
Dia - 100mm |
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| 100 |
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LENSES : DOUBLE CONCAVE (BI- CONCAVE), White glass
Spherical, highly polished and well edged, made from extra white glass. Dia - 50 mm.
Focal length 5 - 10 - 15 - 20 - 25 - 30 - 40 - 50 - 100 cm |
LENSES : DOUBLE CONVEX (BI- CONVEX), White glass
Spherical, highly polished and well edged,made from extra white glass. Dia - 50 mm.
Focal length 5 - 10 - 15 - 20 - 25 - 30 - 40 - 50 - 100 cm |
strong>LENSES: FOR NEWTON'S RINGS EXPERIMENT
Consisting of one flat glass plate and one plano convex lens of focal length 100 cm or 200 cm. with lenses made from
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Dia - 50mm |
Dia - 60mm |
Dia - 75mm |
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Greenish glass |
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White glass |
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LENSES : CONDENSAR
Plano Convex Lenses for Magic lanterns and Photographic enlargers.
Dia Approx. mm |
Focal Length cm |
| 100 |
15 |
| 100 |
20 |
| 112 |
15 |
| 112 |
20 |
| 125 |
15 - 18 |
| 125 |
20 |
| 150 |
25 |
| 150 |
30 |
| 200 |
50 |
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 LENSES : CYLINDRICAL
Plano convex lens having one flat surface and one spherical with positive focal length, manufactured from tint plate glass as well as from white glass.
a) Plano Convex
Diameter 50 x 50 mm , 50 x 45 mm
F.L : 6 cm, 7.5cm, 10 cm, 15 cm
b) Plano Concave
Diameter :50 x 50 mm, 50 x 45 mm
F.L : 6 cm,15 cm, 30 cm
c) Biconvex
Diameter :50 x 50 mm, 50 x 45 mm
F.L : 7.5 cm, 15 cm, 20 cm
D) Biconcave
Diameter :50 x 50 mm, 50 x 45 mm
F.L : 7 cm, 15 cm , 20 cm |
 Equilateral Glass Prisms
An equilateral glass prism is an inexpensive way to demonstrate white light refraction by splitting sunlight into its constituent colors of violet, blue, green, yellow, orange and red. The most popular sizes ofglass science prisms are the 100 & 150mm (4" & 6") which produce larger rainbow color patterns. Be sure to stand with the sun at your back and hold the equilateral glass prism in front of you, 0.5mm (several feet), away from a wall or some light colored surface to see the best refraction results. |
 Right Angle Glass Prism
These right angle prisms can be used differently from standard equilateral (triangular) glass prisms. In the image below, the prism on the left is positioned such that it can be used with a laser to demonstrate light reversal based on internal reflection. The prism to the right is positioned such that the side almost facing you could be used with a light source to reflect light upwards, a simple microscope light source. In either case, reflection can be enhanced if you have a means of "silvering" or mirroring the surface you want to do the reflecting.
Note: Right angle prisms are NOT recommended for refraction (rainbow) experiments. |
 Glass block |
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