LON­GI­TU­DI­NAL WAVES

BBC Earth (Asia) - - Science -

These waves con­sist of a se­ries of com­pres­sions and re­lax­ations in the di­rec­tion of travel, like a slinky spring

given a push along its length. Ex­am­ples in­clude

sound and P-waves.

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