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Previously, the scientists discovered that light can act as an attractive force and be ued to manipulate celectronic components, acting on tiny switches. Unlike the 'push' effect of light (e.g. the sun's effect on asteroids) which acts perpendicular to a surface, the newly discovered forces act at right angles from the direction of travel.
The benefits of using light instead of electricity is that the signal does not deteriorate as much, leading to much greater efficiency.
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