Utmost precision for the Doppler effect
The latest technology and highly effective sensors now make it possible to experimentally investigate the Doppler effect, not only in a qualitative way, but also quantitatively to extreme precision, even when the experiments are carried out by students themselves. Whereas linear experiment systems may only detect values of no more than 0.5 m/s with respect to the speed of the receiver, this compact apparatus allows velocities of up to 35 m/s to be achieved. The benefits of this do not only lie in the much greater precision achievable, but also in the total reproducibility of the initial conditions.
The high velocity readings can be achieved thanks to the fact that the signal transmitter is actually rotating. Rotation of the apparatus is only possible, though, when a cover made of acrylic perspex, 4 mm thick, is securely closed. This is ensured with the help of micro-switches.
Measurements can be read directly from a display measuring 64 x 47 mm in size and featuring touch-screen capability, which also allows for further processing of the data.
A plug-in power supply is included with the apparatus to provide the necessary electricity.