Convergent filter

Imagine you have a bunch of toys scattered around your room, and you want to find only the red ones. A convergent filter is like a special tool that helps you pick up only the red toys and leave the other ones behind.

It works by having a narrow opening at one end, like the tip of a cone, that only allows things of a certain size or shape to pass through. In the case of the red toys, the filter only lets through those that have the color red.

So when you pour all your toys into the filter, only the red ones can pass through the narrow opening, and the other toys get stuck and remain behind.

This makes it easier for you to collect and sort out only the toys you want, and discard the ones you don't need. Convergent filters are used in many different fields, from science and engineering to computer programming and data analysis, to help filter and sort out specific types of information.