Fig. 7.5The electromagnetic vacuum

Fig. 7.5
The electromagnetic vacuum can be regarded as able to support oscillations of the electromagnetic field.
When a high frequency, short wavelength oscillator (a) is excited, that frequency of radiation is present. The presence of low frequency, long wavelength radiation (b) signifies that an oscillator of the corresponding frequency has been excited.

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Gambar. 7.5
The vakum elektromagnetik dapat dianggap sebagai mampu mendukung osilasi dari medan elektromagnetik.
Ketika frekuensi tinggi, osilator panjang gelombang pendek (a) adalah gembira, bahwa frekuensi radiasi hadir. Kehadiran frekuensi rendah, radiasi gelombang panjang (b) es fi signifikan bahwa osilator frekuensi yang sesuai telah bersemangat.