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Sound Transmission. As you have discovered in Lesson 1 sound waves travel in londitudinal waves. What happens when sound travels through a solid or a gas? How would this change how the sound travels? Solid. In a solid the particles are close together. The vibration passes from one particle to the next easily. A sound wave therefore travels quickly through solids. Gas. In a gas the particles are further apart. the vibration passes from one particle to the next less easily. A sound wave therefore travels slowly through gas.

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