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2. Speedtest.net - Wikipedia

   en.wikipedia.org/wiki/Speedtest.net

   Internet speed test. License. Freeware. Website. www .speedtest .net. Speedtest.net, also known as Speedtest by Ookla, is a web service that provides free analysis of Internet access performance metrics, such as connection data rate and latency. It is the flagship product of Ookla, a web testing and network diagnostics company founded in 2006 ...

3. Speed of light - Wikipedia

   en.wikipedia.org/wiki/Speed_of_Light

   The speed of light can be used in time of flight measurements to measure large distances to extremely high precision. Ole Rømer first demonstrated in 1676 that light does not travel instantaneously by studying the apparent motion of Jupiter's moon Io. Progressively more accurate measurements of its speed came over the following centuries.

4. Foucault's measurements of the speed of light - Wikipedia

   en.wikipedia.org/wiki/Foucault's_measurements_of...

   With a rotational speed of 600-800 revolutions per second, the displacement was 0.2 to 0.3 mm.: 128–129 Guided by similar motivations as his former partner, Foucault in 1850 was more interested in settling the particle-versus-wave debate than in determining an accurate absolute value for the speed of light.

5. How to tell how fast your internet speed is using a ... - AOL

   www.aol.com/finance/tell-fast-internet-speed...

   You can test how fast your internet is through free online speed tests, one of which can be found with a quick Google search. Internet speeds are measured in megabits per second, or Mbps. The ...

6. Precision tests of QED - Wikipedia

   en.wikipedia.org/wiki/Precision_tests_of_QED

   Quantum electrodynamics ( QED ), a relativistic quantum field theory of electrodynamics, is among the most stringently tested theories in physics. The most precise and specific tests of QED consist of measurements of the electromagnetic fine-structure constant, α, in various physical systems. Checking the consistency of such measurements tests ...

7. Radar speed gun - Wikipedia

   en.wikipedia.org/wiki/Radar_speed_gun

   A radar speed gun, also known as a radar gun, speed gun, or speed trap gun, is a device used to measure the speed of moving objects. It is commonly used by police to check the speed of moving vehicles while conducting traffic enforcement, and in professional sports to measure speeds such as those of baseball pitches, [1] tennis serves, and ...