LED to laser beam?
I have just started the optics section of my physics class and I was amazed to learn that one can use a simple magnifying glass to form a beam from an LED. Could this be used with a high power LED such as a 100 watt one, and then a beam expander (backwards to compress it) to form a laser beam of sorts. Obviously it wouldn't have a common frequency, but could one theoretically make a very high power, burning beam with this quite easily. I know from experience that holding your finger in front of a mere 10w led can get quite hot, so couldn't using a 100 watt led yield some awesome ant killing hotdog frying results? If not, how many beam combiners would you need to make it work