US$ 19.95
Six-material drilled ball set with 25mm balls of wood
and 0-500mV at plus-or-minus 2
configurable as a heavy pendulum bob or a demonstration mass for Newton's-first-law setups
and tubing
this Wimshurst generator builds a visible high-voltage spark
Dense Flint Glass Prism, 28mm, R=1.62 Length_100mm Six-material drilled ball set withDense lead flint glass prism at 28mm with refractive index 1. 62, the leaded body giving stronger refraction and dispersion than crown glass for comparing material dependent spectral spread.
US$ 19.95
US$ 548.50
US$ 15.22
US$ 21.95
US$ 29.59
US$ 1899.50
US$ 49.95