If a source is transmitting electromagnetic wave of frequency \(8.2 \times 10^6 \mathrm{~Hz}\), then…
If a source is transmitting electromagnetic wave of frequency \(8.2 \times 10^6 \mathrm{~Hz}\), then wavelength of the electromagnetic waves transmitted from the source will be
\(36.5 \mathrm{~m}\)
\(40.5 \mathrm{~m}\)
\(42.3 \mathrm{~m}\)
\(50.9 \mathrm{~m}\)
Solution
Frequency of electromagnetic wave,
\(v=8.2 \times 10^6 \mathrm{~Hz}\)
Wavelength, \(\lambda=\) ?
We know that, velocity of electromagnetic wave is given as
\(\begin{aligned}
c & =\mathrm{v} \lambda \Rightarrow \lambda=\frac{c}{\mathrm{v}} \\
& =\frac{3 \times 10^8}{8.2 \times 10^6}=36.5 \mathrm{~m}
\end{aligned}\)