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THERMAL PROPERTIES OF MATTER

Thermal Expansion

Thermal Conductivity

Speed of Light from Electrical Pulses

Pulses of approximately 100ns duration and 1MHz frequency are transmitted on a 50 meter length of coaxial cable and displayed on an oscilloscope using a T connector. If the free end of the coaxial cable is unterminated, the reflected pulses have the same polarity as the direct pulse. If the free end is shorted out, the reflected pulses are inverted because of the zero voltage boundary condition. Measurement of the time difference between direct and reflected pulses and the length of the coaxial cable gives the speed of electromagnetic waves in the dielectric material of the cable.

Speed of Light from Electrical Pulses
Speed of Light from Electrical Pulses
Speed of Light from Electrical Pulses