In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of 2 ×1010 Hz and amplitude 48 Vm-1. The wavelength of the wave is:
Answer & explanation
Correct answer: option 2
∵ Speed, c = vλ
∴ wavelength, $\lambda=\frac{c}{v}=\frac{3 \times 10^8}{2 \times 10^{10}}=1.5 \times 10^{-2} m$