| 11. | Many efforts have been made to detect gravity waves directly, but all have failed.
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| 12. | This contrasts with non-linear surface gravity waves, which have sharp crests and flat troughs.
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| 13. | Gravity waves have teased physicists for decades, because they have announced their presence only indirectly.
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| 14. | During this time, Lindzen published some research on gravity waves, as well as Hadley circulations.
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| 15. | The quest for gravity waves goes back many years.
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| 16. | Gravity waves should occur whenever a mass is accelerated.
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| 17. | It is designed to look not for light or radio waves, but for gravity waves.
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| 18. | An internal wave is a gravity wave that moves along density stratification within the ocean.
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| 19. | Image : Wave phase . gif See Gravity wave.
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| 20. | In practice, the quest is complicated by the fact that gravity waves are very weak.
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