05-05-2016, 11:30
bob_32_116 Wrote:Hmmm... accordingly to some pedants, all stars are black in the strict scientific sense of the word. That is, they do not reflect any of the light that falls on them.
A tree is green because it reflects mostly light from the green part of the spectrum. A burned tree stump reflects little or no light, therefore, like the sun, it is black. What we call sunlight, or starlight, is an example of "black body radiation." The burned tree stump also emits black body radiation, but its temperature is much lower than that of the sun, therefore it emits in the infra-red so you need special glasses or cameras to see the "light" it emits.
and so concludes today's lesson conducted by Bob Hawking....! no I didn't mean Bob Hawke, LOL.
(you don't quite know us all yet bob_32, and so as not to offend you im letting you know that my comment was purely in jest)
"BTO....Bachman,Turner,Overweight
They were big in the 70s....for five minutes,on a Saturday,after lunch..." - Me 2014.
They were big in the 70s....for five minutes,on a Saturday,after lunch..." - Me 2014.

