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A frequency of oscillation of the electric field vector of a certain electromagnetic wave is \( 5 \times 10^{14} \mathrm{~Hz} \).
\( \mathrm{P} \)
What is the frequency of oscillation of the
W
corresponding magnetic field and to which part of the electromagnetic spectrum does it belongs?
(1) \( 10 \times 10^{14} \mathrm{H}_{\text {Atl }} ; \) Visible region
(2) \( 5 \times 10^{14} \mathrm{~Hz} \); UV region
(3) \( 5 \times 10^{14} \mathrm{~Hz} \); Visible region
(4) \( 7.5 \times 10^{14} \mathrm{~Hz} \); UV region
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