Redneck laser

R

Ravaillac

Joined
Feb 14, 2005
Messages
1,650
Wonder why I haven't seen this before.

article-1351935-0CFA2A49000005DC-304_634x428.jpg



http://www.dailymail.co.uk/sciencet...nted-Death-ray-dish-intensity-5-000-suns.html
Interesting how much power he can get from this *relatively* small surface.
 
Good 'ol parabolic reflectors. I'm sure you know about polishing the bottom of a soda can with a piece of chocolate to achieve the same effect on a smaller scale. When I make homemade parabolic dish antennas for wifi expiriments, I often employ the same trick to determine the focal point of the parabola, instead of all the math. I just coat the inside of the dish with aluminum foil and find the hottest point on a sunny day (yes, I have burned the tip of my finger this way).
It might be interesting to experiment with a packable bowl and a mylar space blanket to see if you can get the same results as a last-ditch firestarting method. Obviously, it would do no good on a cloudy day but if it's easier than friction fire, it might be a good skill to have.
 
Blais said:
Good 'ol parabolic reflectors. I'm sure you know about polishing the bottom of a soda can with a piece of chocolate to achieve the same effect on a smaller scale.
Click to expand...
Yep but it's amazing how much power he got out of it.
 
Certainly is! I have seen similar setups that produced basically the same heat. Have you seen the mythbuster's episode where they attempt to build a solar death-ray?
 
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