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angle of incidence
(redirected from incidence angle)

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.01 sec.
angle of incidence,
the angle at which an ultrasound beam hits the interface between two different types of tissues, such as the facing surfaces of bone and muscle. The angle is also affected by the difference in acoustic impedance of the different tissues.


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So when you combine vectorily the incidence angles, being off by 30 degrees is a pretty good average.
O'Brien's analysis shows that after dust had collected on the detector and as the solar incidence angle decreased over the course of the lunar day, the electrostatic forces holding the dust to the detector's vertical silicon surface weakened, and the dust began to fall off due to gravity.
 
 
 
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