In a phase electromagnetic wave, the electric filed oscillates sinusoidally at a frequency of 2.0 × 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

Wavelength, $λ= c/v = 3 × 10^8/2 × 10^{10}= 1.5 × 10^{-2} m$