Planck constant

The Planck constant is a number that is really important in science. It tells us how energy is related to frequency or wavelength.

Imagine you are coloring with crayons. If you color a lot in one spot, you are using a lot of energy. But if you color softly, you are using less energy.

The Planck constant is like a rule that tells you how much energy you are using when you color. It's like a secret formula that helps scientists understand the behavior of really, really small things like atoms and particles.

Even though this number is really small, it helps explain a lot of things in our world. Scientists use it to figure out how light travels, how electrons move, and even how black holes work!