Sometimes, on the surface of tea, you can observe a delicate film that can shimmer like a rainbow. It's no wonder that the ...

Occasionally, you might notice a delicate film on the surface of your tea, shimmering like a rainbow. It's unsurprising that ...

It might seem like a simple question. But the science behind a blue sky isn't that easy. For starters, it involves something called the Rayleigh effect, or Rayleigh scattering. But that same ...