ch35-p034 - 34. (a) Referring to Figure 35-10(a) makes...

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Thus, the phase difference at point P is φ =d sin θ = 0.397 wavelengths, which means it is between the central maximum (zero wavelength difference) and the first minimum ( 1 2 wavelength difference). Note that the above computation could have been simplified somewhat by avoiding the explicit use of the tangent and sine functions and making use of the small-angle approximation (tan
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