US$ 24.99
Designed to make electric field lines visible
a 12V LED source on a US plug
5 inch specific gravity cylinder with a top hook for spring-scale massing
Plus-or-minus 2
Snell's law
Rectangular Refraction Glass Block, 75 x 50 x 18mm Lab Supplies_Classroom Designed to make electric fieldPairs a 75 by 50mm face with a thicker 18mm body on a rectangular glass refraction block, the optically worked beveled edges widening the visible lateral shift in refraction angle demos.
US$ 24.99
US$ 47.99
US$ 15.00
US$ 14.99