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*) sifat-sifat gelombang elektromagnetik yaitu:
a. Dapat merambat dalam ruang hampa,
b. Merupakan gelombang transversal,
c. Dapat mengalami polarisasi,
d. Dapat mengalami pemantulan (refleksi),
e. Dapat mengalami pembiasan (refraksi),
f. Dapat mengalami interferensi,
g. Dapat mengalami lenturan atau hamburan (difraksi),
h. Merambat dalam arah lurus.Berdasarkan perhitungan yang telah dilakukan Maxwell,
kecepatan gelombang elektromagnetik diruang hampa adalah sebesar 3 x 108 m/s yang
nilainya sama dengan laju cahaya terukur.
2. V = 3x10 pangkat 8
=3 x 1000000000
= 3.000.000.000 m/s
f= 20 MHz = 0.02 Hz
λ = V/f = 3.000.000.000/0.02
= 150.000.000.000 m
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