VWR* Visual Scientifics Photogate Sensor, Four Modes: Gate, Pulse, Pendulum, Frequency, also Works with VISUAL SCIENTIFICS and numerous physical science systems, This kit contains: 2 Photogates, 2Connecting wires, Main photogate hub and control, Wall charger
Ripple Tank, Overhead, Dimensions: 15.5inx12inx4in, 6V DC power source and an overhead projector are required, demonstrates the generation, propagation, reflection, interference and diffraction of waves
Advanced Ripple Tank with Projection Mirror, 21.1lbs, 24.4x15.4x9.4in, Includes: (1) Vibration Generator, (1) Wave monitor unit, (1) Projection screen, (1) Wave dippers, (1) Lever arm and support, (1) Ripple tank, (1) Projection mirror, (1) Set of footers with adjustment screws