Klaynos Posted July 7, 2008 Posted July 7, 2008 Have a look at the wikipedia link I put above... The easiest form is shining a laser through 2 narrow slits.
Kyrisch Posted July 8, 2008 Posted July 8, 2008 Since general use light sources (such as lightbulbs and flames and such) produce incoherent or not-all-in-phase light, and since only coherent light sources can completely destructively interfere (and produce said shadow) it will be difficult to make a flashlight "emit a shadow". Even with a laser, the wavelengths of visible light are so tiny that it is extremely difficult to make two light beams completely interfere using everyday stuff. The closest you can get is light and dark bands by shining a single coherent source through a number of slits spaced very close together.
ydoaPs Posted July 11, 2008 Posted July 11, 2008 Since general use light sources (such as lightbulbs and flames and such) produce incoherent or not-all-in-phase light, and since only coherent light sources can completely destructively interfere (and produce said shadow) it will be difficult to make a flashlight "emit a shadow". Even with a laser, the wavelengths of visible light are so tiny that it is extremely difficult to make two light beams completely interfere using everyday stuff. The closest you can get is light and dark bands by shining a single coherent source through a number of slits spaced very close together. Not to mention complete annihilation would be indistinguishable from emitting NOTHING AT ALL and thus would NOT be emitting a shadow.
honestdude14 Posted July 11, 2008 Posted July 11, 2008 ..sounds alot like trying to create nothingness if you ask me.
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now