发现颜色坐标的变化是由于随氮分压增加，自由电子浓度降低引起等离子体频率降低造成的。
As the nitrogen partial pressure increases, the variation of color coordinate is caused by decrease of free electrons number of the films and decrease of plasma frequency.
着重研究了等离子体临界电子密度、电子等离子体频率等参数对电磁波的折射、吸收、反射的影响。
In this paper, the effects of critical electron density of plasma and the plasma frequency of electron on the refraction, absorption and reflection of the electromagnetic wave are studied.
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