The electric field of an electromagnetic wave in a vacuum is Ey (18.0 V/m) cos((4.88 × 10³) - wt), where x is in m and t is in s. You may want to review (Pages 889 -892). For help with math skills, you may want to review:
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What is the wave's wavelength (lambda) & frequency (f)?
What is the wave's magnetic field amplitude (B)?
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