In SI units, the electric field in an electromagnetic wave is described by Ey = 120 sin(1.40 × 107x - wt). (a) Find the amplitude of the corresponding magnetic field oscillations. 0.4 V HT (b) Find the wavelength i. 0.45 V um (c) Find the frequency f. 1.11848e1:X If you know the wavelength of a periodic wave, what other information do you need to find its frequency? Hz

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