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Aha - I think I've spotted what the problem is in your experiment.Perhaps it's best explained in the form of another experiment...Go around to your neighbour's house in the middle of a bright and sunny day and open all the curtains/blinds in his living room. Perhaps, to ensure that the blinds/curtains aren't stopping any light from getting in, you'd better just pull them down completely. Then make a bonfire in the middle of his living room floor and observe how it doesn't seem to make your neighbour's living room much brighter. Next, wait until it's the middle of the night, go back to your neighbour's living room and start another bonfire. Now observe how the fire seems to make your neighbour's living room much brighter when it's dark.So, where you've gone wrong in your experiment is to paste the two torches on a white background when what you should have done is to paste them on a black background. If you paste them on a black background and the light from the two torches cancel out then the background will stay black but if they don't then the background will get lighter.HTH
Although I have no personal experience of 6*10^15 Hz electromagnetic waves cancelling out It certainly happens at the lower frequency of 909 KHz in two places in my town which is served by two synchronised radio five transmitters operating at this frequency.May I suggest Neilep tries using two lasers instead of torches when he will find the effect more apparent.
What happens to the energy of the cancelled out waves?
Newton's rings are an example of constructive and destructive interference of (monochromatic) light ... [attachment=9567]http://en.wikipedia.org/wiki/Newton%27s_rings
Quote from: Madidus_Scientia on 22/08/2009 03:00:41What happens to the energy of the cancelled out waves?Good questionIt turns up in the bright bits; they are 4 times brigther than they would be with just one light source (as oposed to twice as bright as youo might expect)
If light has no mass, how can it be affected by gravity?
In order to interfere, the waves coming out of the two light sources have to be "out of phase." That means when one is waving up, the other is waving down. When you add them together, you get up+down=0.The light from your torches is going to be a really messy wave that has a lot of randomness in it. Getting it to match up and cancel out another really messy wave is going to be impossible. Lasers have very little randomness and give a nice clean wave. If you use lasers and adjust your system properly, I think you should be able to see the light canceling out in spots. The easiest way to see this is to just use one laser, chop the beam in half (you can use a mirror that reflects half the light to do this) and then use mirrors to direct the laser beams back together. Since you know both beams come from the same laser, they both have the same wave structure, and by adjusting distances between mirrors in your setup, you could make the light interfere and cancel out at points.
If two light beams heat each other at an angle, do they scatter? Or do they continue on the same path?
Wouldn't these photons need to be gamma energies?