標題:
Why 神 七 進 入 黑 障 區 （ 距 地 面 約 40 至 80 公 里 ）時通 訊 中 斷
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發問:
Why 神 七 進 入 黑 障 區 （ 距 地 面 約 40 至 80 公 里 ）時通 訊 中 斷 ? 更新: Here is my understanding: When the spacecraft reach 80km in attitude, the surrounding has just enough density of air to create plasma. As it slow down to 40km, its speed has just enough friction to make plasma enclosure. So, the region of 黑 障 區 is within 40~80km. Am I right?
最佳解答:
神七與大氣摩擦,產生一層等離子,它能將電磁波反射,令通訊中斷.
其他解答:
It is because the tremendous heat produced by air friction creates a volume of plasma 電漿(which is ionized gas) surrounding the spacecraft. Electromagnetic waves from communication devices cannot penetrate through this plasma volume as the strength of the electric field in the wave is rapidly attenuated by the ions in the plasma.
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