Diffraction Grating Glasses, 500lines/mm, Highly efficient, Single axis holographic diffraction grating lenses separate light from any source into its spectral components for study/analysis, Used with Power Supply/ Spectrum Gas Tubes, Make study of light easy
Tuning Fork Octave, 8Pk C (256Hz) - C (512Hz), Steel Tuning Forks For Physics Experiments, May Be +/- 5% Of Stated Frequency, Includes: (8) Tuning Forks, Nickel-Plated, Plain Shanks, With Frequency Marked, C (256), D (288), E (320), F (341), G (384), A (426), B (480), C (512)
Tuning Fork Set Of 8 With Hammer, With Foam Lining For Easy Storage Of All Parts. Frequency Marked 256Hz, 288Hz, 320Hz, 341Hz, 384Hz, 426Hz, 480Hz & 512Hz. Complete With Hammer.
Stroboscope, A Hardboard Disc With Twelve 50 X 3 mm Slots And Finger Hold, Pivoted On A Ball Bearing Mount Which Also Acts As A Convenient Handle. Diameter Of Disc 255 mm