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Oilfield Glossary
Oilfield Glossary
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apparent wavelength

1. n. [Geophysics]

The wavelength measured by receivers when a wave approaches at an angle. The relationship between true and apparent wavelength can be shown mathematically as follows:

λ = λa sin θ,

where
λ = wavelength
λa = apparent wavelength
θ = angle at which a wavefront approaches the geophone array.