Very good point. The initial experiment was carried out in a well lit shed. After I read your response I moved outside to try it again.Today is completely clear, not a single cloud in the sky.Unidian wrote:No, not necessarily. Molten aluminum has low emissivity and high reflectivity, meaning that although it will luminesce faintly across the standard red-yellow continuum, it appears silvery-gray in highly illuminated daylight conditions. Physics professor Steven E. Jones, among others, has shown this to be the case. What sort of lighting conditions were used in your experiment?Jason wrote: Anyway, my five minute, first-hand experiment, appears to have debunked one bit of your "evidence". That seems quite problematic no?
Result: when the molten aluminium is in direct sunlight I can't see any glow at all. However, still outside, if a shadow, such as from a tree, building or just from myself is cast over the aluminium, I can see a dim orangy/red glow.
I'm only heating up small pieces of aluminium, if there were a large puddle the glow might be easier to see. Disclaimer: I'm not suggesting these little experiments have anything to add or take from the experts opinions.