Electrophorus - Demonstration, Comprises a thick plastic base with four rubber feet alongwith with 18 cm diameter aluminium plate with an insulating handle. Produce a strong spark repeatedly, without recharging. 18 cm diameter aluminum plate
Spectrum tube Power Supply, Connecting sockets are fully shielded to prevent electric shock. The bottom socket is spring loaded so tubes can be changed easily. Operates on 220V. The cord is 8 inch. Overall dimensions: 14-1/2inch x 4-1/2inch x 3inch
vertically-aligned set LED, easy and dramatic demonstration of the relationship between the color and wavelength of light, spectral range of each LED can be investigated with spectrometer, or just viewed for comparisons with each other