qijino1236 Posted December 9, 2011 Share Posted December 9, 2011 (edited) For this topic you must watch this video first... http://www.youtube.c...hU&feature=fvsr He says... "And those things(atoms) are charged so they "OUGHT" to interact with the electromagnetic field. So that means they ought to be able to give some energy to electromagnetic waves. So doesn't that mean that light gets to play? " What does he mean by they "ought" to interact ...that is a vague term...does that mean that physicists are just "guessing" that this interaction is occurring or have there been scientific tests done?. And what does he mean by light gets to play?... apparently that video link did post..http: //www.youtube. com/ watch?v=jbxty6aDfhU&feature=fvsr "hotter objects give off a lot more light than cooler objects"… So then how I can some leds give off the same lumens as incandescent light but be not as hot? Edited December 9, 2011 by qijino1236 Link to comment Share on other sites More sharing options...
swansont Posted December 9, 2011 Share Posted December 9, 2011 For this topic you must watch this video first... http://www.youtube.c...hU&feature=fvsr He says... "And those things(atoms) are charged so they "OUGHT" to interact with the electromagnetic field. So that means they ought to be able to give some energy to electromagnetic waves. So doesn't that mean that light gets to play? " What does he mean by they "ought" to interact ...that is a vague term...does that mean that physicists are just "guessing" that this interaction is occurring or have there been scientific tests done?. And what does he mean by light gets to play?... It's just how he's phrasing the question "Does this concept apply to light?" and the answer, of course, is yes. He's saying that we expect this to be true, because charged particles interact with electric fields "hotter objects give off a lot more light than cooler objects"… So then how I can some leds give off the same lumens as incandescent light but be not as hot? LEDs are not emitting a blackbody spectrum, i.e. it's not because they are hot. They emit light because electrons can make a transition between states of the semiconductor and we engineer the materials to have an energy drop that gives us visible photons. Link to comment Share on other sites More sharing options...
qijino1236 Posted December 12, 2011 Author Share Posted December 12, 2011 We expect this to be true, because charged particles interact with electric fields ... We expect ... but do we know... has there been a scientific test done? Link to comment Share on other sites More sharing options...
swansont Posted December 12, 2011 Share Posted December 12, 2011 We expect this to be true, because charged particles interact with electric fields ... We expect ... but do we know... has there been a scientific test done? On blackbody emissions? Just many thousands of them; this dates back more than a century. It's the kind of field that's so old and well-established that other areas of science and industry are based on the principle. http://en.wikipedia.org/wiki/Black_body Link to comment Share on other sites More sharing options...
Realitycheck Posted December 13, 2011 Share Posted December 13, 2011 "ought to" basically means "should". Link to comment Share on other sites More sharing options...
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