I am just a beginner with adobe after effects. What am I looking for is the answer how could I achieve this kind of effect which is shown below. I mean that effect of "radio wave" with some kind of glow after stretched. It is clearly connect with a drop of coffee into liquid. And i achieve this using radio waves but I dont know how to add inside this this "glow"
instead of radio waves, use a a shape layer and set its gradient radial fill to center with transparency and edges opaque... or create the perfect shape you need in illustrator and import it to Ae. or you can experiment with the glow effect or layer styles inner glow.