(no subject)

An odd thought came into my mind, and it may be worthy of an experment by someone more capable.

We have red, green, and blue lasers now, both throwing out different wavelength light.  If I understand correctly, you can adjust the brightness of each laser, by adjusting three key (and several minor) variables, one of which is how much power is pumping through each laser.

What would happen if you take these lasers, up to an equal power level, and aim them at a single point in 3D space?  Would you get a point of white?

If so, what would you get if you adjust the power down on all of them?  Would you get shades of grey?

What if you adjusted only the red down?  Or the blue?  Or maybe the green?  Could you get different colors?

If you could, what would happen if you swept the three lasers in such a way that you could create a mid-air display?  Could a laser be turned on/off that quickly, or would you have to keep it on and use a door/gate mechanism to shutter it on/off quickly? 

Could you get a good frame rate?

Could you play any movie on it, in mid-air, like it was a movie screen?

Could you extend it, from 2D to 3D?

Could you create a Holodeck?  Or a PHISH tank?

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