MHT CET · Physics · Electromagnetic Waves
The frequency of radio waves corresponding to a wavelength of \(10 \mathrm{~m}\) is
- A \(3 \times 10^{7} \mathrm{~Hz}\)
- B \(3.3 \times 10^{8} \mathrm{~Hz}\)
- C \(3 \times 10^{9} \mathrm{~Hz}\)
- D \(3 \times 10^{-7} \mathrm{~Hz}\)
Answer & Solution
Correct Answer
(A) \(3 \times 10^{7} \mathrm{~Hz}\)
Step-by-step Solution
Detailed explanation
Wavelength, \(\lambda=10 \mathrm{~m}\)
\(
c=3 \times 10^{8} \mathrm{~ms}^{-1}
\)
By using \(c=v \lambda\)
\(
v=\frac{c}{\lambda}=\frac{3 \times 10^{8}}{10}=3 \times 10^{7} \mathrm{~Hz}
\)
\(
c=3 \times 10^{8} \mathrm{~ms}^{-1}
\)
By using \(c=v \lambda\)
\(
v=\frac{c}{\lambda}=\frac{3 \times 10^{8}}{10}=3 \times 10^{7} \mathrm{~Hz}
\)
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