Physics 42

Vibration Generator, Premium

A generator for producing mechanical vibrations when used with a function generator. The input is fed to a coil which is mounted within the field of a cylindrical permanent magnet. The unit is fuse protected. TI-SI30825 £105.00 ea

Ripple Tank Kit

An overhead projector type ripple tank for demonstration of wave phenomena (reflection, refraction, diffraction, interference). Two arms hold an electric motor, onto which either two-point, or a planewave dipper can be attached. An overhead light source, illuminates the tank and casts a shadow of the waves onto the bench below. Accessories include: concave/ convex/rectangular perspex plates; curved reflector; three barriers; two-point dippers; hand stroboscope; banana leads. The motor requires a continuously variable 0-5 V DC power supply, and the lamp requires a 12 V AC supply. Alternatively, the ripple tank can be driven by the SO180324 ripple tank & LED driver. This apparatus comprises a reservoir with a bourdon gauge, connected to a vertical glass tube. The reservoir has a needle valve to control pressure, and a high-quality tyre-type valve for attaching the supplied pump. Air does not escape when the pressure is increased, until the needle valve is opened. The pressure is displayed on a bourdon gauge, which has a transparent back, allowing students to see the internal workings. Pressures of up to 3.5x atmospheric pressure can be measured, which provides a good range of measurements. The tube has graduations so that the length of the air column can be measured, and is of uniform cross-section, so the volume of air is proportional to the length of the air column. Unlike traditional Boyle’s Law apparatus, this unit has no rustable materials, so water can be used instead of oil, which offers superior results, as well as reduced hazard and mess. The water is pumped into the tube, and the pressure and volume of air is measured at regular intervals. The inverse relationship between pressure and volume at constant temperature is easily observed. TI-HE180640 £140.00 ea

TI-SO180320 £79.95 ea

Ripple Tank Kit, Frederiksen

Provides a comprehensive demonstration of the general properties of waves. Wave propagation phenomena are projected onto a screen. Teachers notes and experiments are provided in a superb manual. Kit comprises: • Variable vibrator • Ripple tank • Wave dampers • Electronic stroboscope projection mirror • Screen (30 x 33 cm), Wave dippers, and Accessories • Now comes complete with power supply and flashing LED strobe instead of a rotating disc PLEASE NOTE: Tripod not included (ST110120).

TI-SO86275 £615.00 kit

Timstar Rubens' Tube

Designed by Timstar, the Rubens' Tube provides memorable demonstration of standing waves. The Rubens' Tube consists of an 10 cm diameter aluminium tube with a row of small holes drilled along the top, and a 15 W loudspeaker mounted at one end. Natural gas or LPG can be used, with a length of burner tubing to connect it to the supply. The speaker can be driven directly using a signal generator with power output, but a Rubens' Tube Driver (SO180900) is recommended for best effect. For more info and videos, visit timstar.co.uk Designed and manufactured in the UK.

Charles' Law, Superior

Comprises a capillary tube and thermometer, mounted on a board with a scale behind the capillary tube. The apparatus comes complete with oil in a separate bottle for ease of filling the capillary tube, so no difficult filling with sulfuric acid is required. Available as singularly or as a class set of 10 in a Gratnells case.

Type

Quantity

TI-HE180014 Single Units 1 £19.95 ea TI-HE180015 Class Set in Gratnells Case 10 £195.00 set

Microwave Apparatus Set

Microwave transmitter/receiver apparatus for investigating transverse waves, using 2.8cm wavelength. Kit includes Probe Detector and instructions for experiments on wave reflection, refraction, polarisation and interference. • Plane polarised wave for transmitter, internally modulated with 1 kHz tone, music, or no modulation. • Built in gain control for receiver, with 30 bar signal strength indicator • External outputs to data-loggers and external meters • Built in loudspeaker for the receiver, with on /off control. • Auxiliary input for external simple tones to transmit through microwaves.