The Y Component of the Electric Field of an Electromagnetic

question 44

Multiple Choice

The y component of the electric field of an electromagnetic wave traveling in the +x direction through vacuum obeys the equation E_y = (375 N/C) cos[kx - (2.20 × 10¹⁴ rad/s) t].What is the wavelength of this electromagnetic wave? (c = 3.0 × 10⁸ m/s)

• A) 0.272 µm
• B) 1.36 µm
• C) 2.72 µm
• D) 8.57 µm
• E) 17.1 µm

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