TDR – Kerry D. Wong

Direct Measurement of the Speed of Light using a Cheap Laser Diode – II

October 3, 2015 By kwong

In my previous blog post, I discussed the basic TOF method for direct measurement of the speed of the light. In order to measure the time of flight accurately, we need to be able to both generate and detect very…

Direct Measurement of the Speed of Light using a Cheap Laser Diode – I

September 27, 2015 By kwong

Speed of light c in air can be measured either directly or indirectly. There are many ways to infer c with indirect measurements. For instance, we can measure the propagation delay of a signal through a coaxial cable (or an…