To verify the laws of refraction. Dimensions: (l x w x h), 70 x 70 x 10mm. With opposite edges frosted and the other two polished.

Tuning forks of frequencies 256, 288, 320, 341.3, 384, 426.6, 480, 512Hz. In a wooden case

For demonstrating the relationship between sound and vibrations, the energy transfer between resonating systems and as a source of standard frequencies. Milled from non-rusting non-magnetic aluminum bar stock. Plain shank form. Stamped with the musical scale note sounded by the fork and the frequency in Hz at the base of the tine of each fork. Lengths vary.

To verify the laws of refraction. Dimensions: (l x w x h), 70 x 70 x 6mm. With opposite edges frosted and the other two polished.

Three diffraction gratings of 100/300/600 lines per mm in one mount.

Diffraction grating pressed between clear glass plates. Ideal for class room demonstration. Size 60mm x 40mm. View area: 45mm x 30mm.

Includes tuning forks of frequencies from 256 to 512Hz listed above. In a fitted velvet lined case.

Individually constructed of forged steel. Plain shank form. Stamped with the musical scale note sounded by the fork and the frequency in Hz at the base of the tine of each fork. Lengths vary. Chrome / Blue plated

To verify the laws of refraction. Dimensions: (l x w x h), 114 x 63 x 18mm. With frosted faces and clear edges.

To verify the laws of refraction. Dimensions: (l x w x h), 114 x 63 x 18mm. Polished on all sides.

Dimensions : 60mm long and 12mm thick. Bottom surface and both edges are frosted.

Dimensions: 90mm long and 15mm thick plate. Bottom surface is frosted.

Unit conversion cards are used to aid students in learning different units of mass, time, length, energy, force, area, volume, temperature; as well as converting them among different systems. Comes with a 12 page instructions.

A durable plastic balance from MiniScience, designed to teach young children concepts of mass and weight-ideal for elementary level.