US$ 17.95
and 500mm focal lengths for comparative refraction experiments
chloroplasts
000 lux through a separate probe with a CIE photopic spectral response
panel-mounted with 4mm sockets and an enclosed earth pin for safe wiring during induction and AC ratio demos
rocker arms
15-Piece Electrostatic Demonstration Kit Physics_Electricity & Magnetism and 500mm focal lengths forComprehensive 15 piece electrostatics set bundling electroscopes, a Faraday cage, ice pail, electrophorus, and friction rods for a full unit on charging, induction, and lightning rods.
US$ 17.95
US$ 17.95
US$ 124.74