Disturbances are any problems or events that cause chaos or disorder. They can be physical or psychological, but they all cause problems.
To ripple is to cause waves to travel through a liquid or a solid. When you splash water on the ground, you're causing ripples to spread through the water.
A trillionth of something is a very small amount. To say that something is a trillionth of something is to say that it is very, very small.
The billionth is a number that is very large. It's equal to 1,000,000,000. This number is so large that it's impossible to say it with words.
Wavelengths are the distances between one point on a wave and the next point on the same wave. They are measured in meters.
Momenta is Latin for "momentum." It is a force that is responsible for moving objects forward or backward.
To narrower something is to make it narrower or smaller. When you narrow a road, you make it so that cars can only go in one direction.
A physicist is a scientist who studies the physical world. They study things like atoms and particles, and the laws that govern them.