They won't work, so you search to find two liquids that are very close in density and are insoluble. The heavier liquid absorbs the heat, and as it heats up, it expands. Because the liquids have very similar densities, the formerly heavier liquid is suddenly lighter than the other liquid, so it rises.
As it rises, it cools, making it denser and therefore heavier, so it sinks.
This all happens in slow motion because heat absorption and dissipation are fairly slow processes, and the density changes we are discussing here are very slight.
Thermoluminescence Dating Thermoluminescence can be used to date materials containing crystalline minerals to a specific heating event.
[Verse 1] In the half light of the evening I can almost see you glow Can tell by the way you're moving Time may be right to let you know You got many coloured halo The body of Venus, a babe rainbow And if I come any closer I might fall into your silhouette But the shape of things to come is constantly changing So let it, so let it, so let it flow [Chorus] La la la la lava lamp La la la la lava lamp [Verse 2] Indigo, violet and blue Can we meet where the edges blur?
This is useful for ceramics, as it determines the date of firing, as well as for lava, or even sediments that were exposed to substantial sunlight.
These crystalline solids are constantly subjected to ionizing radiation from their environment, which causes some energized electrons to become trapped in defects in the molecular crystal structure.
For now, GE's just calling it the C by GE Lamp, though I'd challenge them to do better given the fact that it's such a unique-looking product.
Preorders are expected to start in early 2017, with devices set to arrive on the C by GE website and on Amazon in the second quarter of the year.