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Scientific illustration of an acoustic longitudinal wave showing red compressions, blue rarefactions, a sinusoidal curve, and labels for amplitude, wavelength, and propagation direction.

Scientific illustration of an acoustic longitudinal wave showing red compressions, blue rarefactions, a sinusoidal curve, and labels for amplitude, wavelength, and propagation direction.

Vertical scientific illustration, 1200x1800, realistic illustration of an acoustic longitudinal wave in air shown as a vertical cross-section: a smooth sinusoidal pressure curve running down the center, with overlaid microscopic particles aligned horizontally whose spacing varies to show compressions and rarefactions; compressions colored vivid red, rarefactions colored vivid blue; subtle volumetric lighting, soft shadows and gentle depth of field for a realistic, tactile look; background very light off‑white with a faint paper texture; handwritten German labels in dark charcoal ink, slightly slanted: 'Kompression' (pointing to red compressed region), 'Verdünnung' (pointing to blue rarefied region), 'Ausbreitungsrichtung' with an arrow showing propagation direction, 'Wellenlänge (λ)' marking distance between two compressions, 'Amplitude' marking peak deviation, 'Ruhedruck (p₀)' and 'Ruhedichte (ρ₀)' near baselines; clean, high detail, scientific but aesthetic, balanced composition, legible labels, no equations, no extra diagrams, file output PNG, high resolution. Mehr sehen