A Planar Cross Section Through Two Spherical Waves Emanating from the Sources

question 1

Multiple Choice

A planar cross section through two spherical waves emanating from the sources S₁ and S₂ in the plane is shown in the figure.The black circles are one and two wavelengths from their respective sources.The lighter circles are one half and one and a half wavelengths distant from their respective sources.If the phase at S₁ and S₂ is zero at this instant,and the waves shown arriving at P₁ both arrive with amplitude A,the magnitude of the phase angle of each wave at point P₁ (in radians) is

• A)0.
• B)π.
• C)2π.
• D)3π.
• E)π/2.

---

Definitions:

Equivalent Annual Annuity

A method used in capital budgeting to compare the profitability of investments with different lifespan by converting them into an equivalent annuity.

Net Present Value

The calculation that compares the value of a dollar today to the value of that same dollar in the future, taking inflation and returns into account.

Cost of Capital

The return rate that a company must earn on its investment projects to maintain its market value and attract funds.

Capital Rationing

The process of selecting the best projects for investment under conditions of limited resources, ensuring optimal utilization of capital.