Like light waves, radio frequency energy tends to travel in a straight line. In the lower frequencies, radio waves that shoot skyward bounce back from electrically charged layers of the upper ...
Fig. 2. The model of electromagnetic wave incident on 3D surface. Fig. 3. Model of an asteroid under incident electromagnetic waves. Rotation angle of the asteroid: ①β= 0°; â‘¡ β= 30°; â‘¢ β= 90°. Fig. 4 ...
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