Arabic translation: أداة قياس/مقياس سرعة تدفق شعاع الليزر
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laser Doppler velocimeter (LDV)
A laser device that uses either optical heterodyning or scanning interferometry to measure flow velocities by means of the Doppler shift.
doppler shift: The degree of observed change in frequency (or wavelength) of a wave due to the doppler effect.
doppler effect: The change in the observed frequency (or wavelength) of a wave, caused by a time rate of change in the effective path length between the source and the point of observation.
Shazly Egypt Local time: 02:38 Works in field Native speaker of: Arabic PRO pts in category: 8