Source holder for Risø sources*) for use with for 514100 Mounting bench or 514102 Rail for mounting bench. Simple model without option for rotating the source.

Like 199000, this apparatus is used to demonstrate the principle of independence but with the option of a variable horizontal speed.

Aluminium, 100 g, Ø30×61 mm

Brass, 100 g, Ø25×31 mm

Set of three specific heat weights consisting of: 272502 Aluminium 100 g 272501 Brass 200 g 272504 Bismuth 200 g

Very short but powerful pulses of light are emitted from the box.When the light pulses hit the special retroflective foil of the reflector they are directed back towards the source – with no need for tedious adjustments.Via a beamsplitter, the light pulses finally hit a high speed photodiode, converting them into electric pulses to be displayed on an oscilloscope.A separate synchronization signal marks the time of pulse emission and constitutes a reference for timing the pulses.

SpeedGate is a dual beam photocell with a built-in display.With two light rays it is possible to directly measure the velocity of an object passing the photocell.The display renders an external counter dispensable.

For use with commutator item no. 470500.

Spare spring set for 218000 Prytz oscillation apparatus.Three pairs of springs with different spring constants.