The electric fields arriving at a point P from three coherent sources are described by E1 = E0 sin ?t, E2 = E0 sin (?t + ?/4) and E3 = E0 sin (?t + ?/2). Assume the resultant field is represented by Ep = ER sin (?t + ?). The amplitude of the resultant wave at P is
a. E0.
b. 1.5E0.
c. 1.7E0.
d. 2.4E0.
e. 2.9E0.
d
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When a damping force is applied to a simple harmonic oscillator which has period T0 in the absence of damping, the new period T is such that
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