Markowitz, William Department of Physics, Nova University, Fort Lauderdale, Florida.
- Additional Readings
A determination of the duration between two instants of time (epochs). Time intervals are measured with high precision with a digital display counter. An electronic oscillator generates pulses; the count begins with a start signal and ends with a second signal. For an oscillator frequency of 100 MHz, for example, a direct reading is correct to 10 nanoseconds (1 ns = 10−9 s). Two atomic clocks, however, can be compared in epoch to 1 picosecond (1 ps = 10−12 s) by electronic interpolation. See also: Atomic clock; Digital counter; Oscillator; Oscilloscope
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