my guess is rpm
Stroboscope.
bhb
The word "strobe" is derived from the word stroboscope, which was invented in 1832. Stroboscope is a combination of the Greek words "strobos" (meaning spinning) and "skopos" (meaning watcher). The shortened form "strobe" came into common usage in the mid-20th century.
A stroboscope produces flashes of light to freeze the motion of a moving object. By adjusting the frequency of the flashes to match the speed of the object, the object appears stationary or moving slowly, allowing for detailed observation or analysis. This effect is commonly used in scientific research, industrial settings, and entertainment.
A stroboscope is usually just a lamp, set to flash quickly and repeatedly with an often tuneable and consistent frequency. Strobes used to set the ignition timing on engines with spark plugs usually look a bit like a gun, but otherwise they can look like pretty much any lamp.
A stroboscope is any various instrument used to observe moving objects by making them appear stationary, especially with pulsed illumination or mechanical devices that intermittently interrupt observation.
Planetary atmospheres, the atmospheres of red giant stars, and galaxies were the three primary scientific targets of Stroboscope II.
Principle of conservation of energy Principle of conservation of momentum Principle of relativity Principle of causality Principle of least action Principle of symmetry and invariance
A stroboscope uses a series of flashes to make a fast moving object seem slower. A stroboscopic tachometer has a scale that reads either in revolutions per minute or flashes per minute.
Principle of Risk Variation. Principle of Cost of Capital. Principle of Equity Position. Principle of Maturity of Payment.
"a man of principle" "the principle of jet propulsion"