The Y Component of the Electric Field of an Electromagnetic

question 30

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 x 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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Definitions:

M&M Proposition I

A theorem stating that in a perfect market, the market value of a company is unaffected by how that company is financed, regardless of whether through debt or equity.

Debt

An amount of money borrowed by one party from another, to be repaid with interest.

M&M Proposition II

A theory in corporate finance that asserts the cost of equity is a linear function of the company's debt/equity ratio, under the assumption of no taxes and financial distress costs.