You can use water rippling effects using CompizFusion.
It is very possible that the water ripples when a duck farts, because the water ripples when a human farts. The air coming out of the duck would make a ripple in the water.
Only something of very little mass could fall on a lake yet not make ripples in the water. A leaf or bits of dust may fall and make very few ripples but there would always be some however small. Only something like sunlight particles could be said to cause absolutely no ripples.
Ripples are formed by a friction of moving air and water.
Ripples on the surface of a pond are an example of wave motion.
As it slides over the water surface film, air makes it move. As the water moves, it forms eddies and small ripples. Then waves are formed from these ripples
Ripples on a pond who encounter a large rock in the water will reflect off the rock. The medium for a ripple in a pond is the water.
Sound and Water-Ripples.
As it slides over the water surface film, air makes it move. As the water moves, it forms eddies and small ripples. Then waves are formed from these ripples
To make small waves
makes little ripples in the water
riffle
i.e. mechanical waves travelling through water? Light of course. Otherwise how would you see the ripples? Light travels at 299,792.458 km/s.