The Electric Fields Arriving at a Point P from Three $\omega$

question 8

Multiple Choice

The electric fields arriving at a point P from three coherent sources are described by E1 = E0 sin $\omega$ t, E2 = E0 sin ( $\omega$ t + $\pi$ /4) and E3 = E0 sin ( $\omega$ t + $\pi$ /2) .Assume the resultant field is represented by Ep = ER sin ( $\omega$ t + $\alpha$ ) .The amplitude of the resultant wave at P is:

• A)E0.
• B)1.5E0.
• C)1.7E0.
• D)2.4E0.
• E)2.9E0.

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Definitions:

Sample Mean

The average of a set of numerical values drawn from a larger population.

Confidence Interval

A spectrum of values obtained from sample statistics, which is probable to encompass the value of an unidentified population parameter.

Population Parameter

A numerical characteristic or feature of an entire population, such as its mean or standard deviation.

Sampling Distributions

The distribution likelihood of a statistical value gathered from multiple samples from a given population.