Okay kiddo, so there is something called the frank-tamm formula that helps scientists understand how light interacts with different materials.
You know how colors look different on different things? Like a red shirt looks different on a black table than on a white table? Well, the frank-tamm formula helps scientists figure out how much of the light that hits an object gets absorbed or bounced off.
It's kind of like a math equation that helps scientists figure out how much of the light that hits an object gets "eaten up" by the material it's made of. This information is really important for lots of different things, like making new materials or understanding how certain chemicals work.
So, the frank-tamm formula helps scientists figure out how much light gets absorbed or reflected, which is really important for understanding lots of different things.