please explain term velocity selector
Asked by vinodjoshi112233 | 12th Jun, 2017, 06:37: AM
Expert Answer:
-Velocity selector is a device consisting of perpendicular electric field (F = qE) and magnetic fields (F = qvB) that can be used as a velocity filter for charged particles.
-Devices like electron microscopes and spectrometers use this principle for operating.
-It is used in accelerator mass spectrometry to select particles based on their speed.
-Velocity selector segregates the particles such that the particles with the correct speed remain unaffected or undeflected while other particles will be deflected.
-Wilhelm Wien developed this phenomenon in the year 1898 for the study of anode rays and therefore velocity selector is also called Wien Selector.
Answered by Abhijeet Mishra | 12th Jun, 2017, 11:32: AM
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