Okay kiddo, let me explain what integral linearity is in a really simple way. Imagine you have a big bucket filled with water and you want to measure how much water is inside it. You can use a measuring cup to scoop out the water, but if the measuring cup is not accurate, you might get the wrong measurement.
Now, integral linearity is like using a measuring cup that is very accurate. It means that when you measure something, you get the exact measurement even if you measure it in different ways. So, if you measure the water in the bucket using different sizes of cups, you should still get the same amount of water.
In science and engineering, we use integral linearity to measure things like temperature, pressure, and electric currents. This helps us to make sure that our measurements are accurate and reliable, which is really important when we are designing things like cars, planes, and medical devices.
So, integral linearity is like having a very precise measuring cup that always gives you the right amount, no matter how you use it. Does that make sense, kiddo?