Okay kiddo, when we talk about "mv bright field," we're really talking about looking at very tiny things called cells.
Think about when you look at a picture in a book or on a screen. Sometimes the picture is too dark or too light, right? Well, when we look at cells, we want to make sure the picture is just right so we can see all the details. That's where "mv bright field" comes in.
"Mv" stands for "millivolt," which is a tiny bit of electricity that we use to light up the cells, kind of like turning on a light in a dark room. And "bright field" just means we're using a special microscope that lets us see the cells really clearly.
So basically, "mv bright field" helps us see all the little details of cells by using a tiny bit of electricity to light them up, and a special microscope to make the picture just right. Cool, huh?