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what happens when two beams of light pass through each other perpendicular to each other??
Nothing: light (photons) does not interact with itself. Thus the two lightbeams will simply go strait through eachother.
yah thats what i thought but this guy i know said i was wrong. thanks.
IIRC, Photons can indeed interact with other Photons, but only with great difficulty and very weakly.
eg. http://arxiv.org/abs/hep-ph/9308293
It depends if the beams were coherent or not. But two beams passing perpendicularly wouldn't be affected either way as the field components would be in the wrong directions
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