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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: |
24 ×10-10 m 1.5 ×10-2 m 4.16 ×108 m 3 ×108 m |
1.5 ×10-2 m |
∵ Speed, c = vλ ∴ wavelength, $\lambda=\frac{c}{v}=\frac{3 \times 10^8}{2 \times 10^{10}}=1.5 \times 10^{-2} m$ |
