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No, the wavelength of a wave does not change if it is traveling towards you. The wavelength of a wave is defined as the distance between two consecutive points in the wave that are in phase, such as two adjacent peaks or troughs. This distance remains constant for a given wave, regardless of the direction in which the wave is traveling.

However, the frequency of a wave does appear to change when it is approaching or receding from an observer due to the Doppler effect. The Doppler effect is the apparent change in frequency of a wave caused by the relative motion between the source of the wave and the observer. If a wave source is moving towards you, the perceived frequency of the wave will be higher, resulting in a higher pitch (for sound waves) or a shift towards the blue end of the spectrum (for light waves). Conversely, if the wave source is moving away from you, the perceived frequency will be lower, resulting in a lower pitch (for sound waves) or a shift towards the red end of the spectrum (for light waves).

In summary, while the wavelength of a wave remains constant regardless of its direction of travel, the perceived frequency can change due to the Doppler effect when the source of the wave is in motion relative to the observer.

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