Now I have my glass disk positioned so that the light is hitting at just the angle of total internal reflection. If I place a drop of water on the glass disk, that increases the refractive index ...

Rachael Blakey: "I placed some water drops on to a metal spring, and I captured the reflection of an eye in the water drops. Location: New Brunswick, Canada." Ian Mason: "The moment you realise ...

"However, this is far from a trivial question. The prevailing opinion is that forest fires can be sparked by intense sunlight focused by water drops on dried-out vegetation." The team conducted ...