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Fibre Optic Speed of Light Equipment.
This kit is used to measure the speed of light directly with an easily understandable method.
Moreover the value of the speed if light in air can be compared to that developed in the plastic of a fibre optic cable to calculate the index of refraction.
This equipment enables to carry out a wide range of tests.
TRAINING PROGRAM
Calculating the speed of light
Studying the basic principles of fibre optics
Actual applications of fibre optics
Realization of a wide range of experiments This equipment includes a transmitter and a receiver, two Fresnel lenses with lens holder, a mirror, power supply unit, connection cables.
The transmitter includes a high-intensity LED with pulses of 1 MHz and it supplies the oscilloscope with a sync pulse.
The trajectory of the light pulse is displayed as Y1 on the oscilloscope.
The light pulse is sent to the receiver where the signal is displayed as Y2.
This test will be carried out twice : the first time, with transmitter and receiver aligned directly at a distance of 1 metre, then the test is repeated with pulses crossing the laboratory up to the mirror where they are reflected backwards.
Measuring the difference of position of trace Y2 in the two cases and the time (usually, 0.1 μs) spent in coming back through laboratory (generally, 30 m) will enable to determine the speed of light.
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