Propagation Of Waves On The Liquid Surface
The propagation of waves on the liquid surface is controlled by 3 external forces:
i. Gravity
ii. Surface tension and
iii. Hydrostatic pressure.
If gravity plays the main role, we call the waves gravity waves.
These waves
(a) are deep waves;
(b) have long wavelengths; and
(c) are of comparatively small curvature.
When the main controlling factor is the surface tension, the waves are called **capillary waves.**
If both the gravity and surface tension control the propagation of the waves, we call the waves **ripples.** They have small wave lengths.
#### Velocity of Gravity Waves
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