ELI5: Explain Like I'm 5

Double junction

Okay little one, let's talk about double junctions!

You know how sometimes you want to go on a walk but you have to cross a really big street? To make sure you stay safe and not get hit by a car, you might look both ways before you cross. That's kind of like what a double junction is.

In science, when we want to measure something using a special tool called a pH meter, we have to put the tool in a liquid to see how acidic or basic it is. But sometimes, the liquid we want to measure can interfere with the pH meter and give us the wrong reading. This is where a double junction comes in.

A double junction is like a special door or gate that pH meters use to make sure the liquid they are measuring doesn't mess up the reading. It has two parts that keep the liquid being measured separate from a special solution that helps the pH meter work correctly. This way, we can get an accurate reading of how acidic or basic the liquid really is.

Just like how looking both ways before we cross a street keeps us safe, using a double junction keeps our pH readings accurate and reliable. Cool, right?
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