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Light is an electromagnetic wave and in laser the waves are more parallel then in incandescent light, where each wave has it's angle of vibration, it's color and it's brightness.
Laser can cover with light a very small region, because of it's slim beam, while an incandescent bulb spreads the light in all directions, in the same time, being able to light large areas.
The energy created by laser is focused in the beam, being able to cause cuts, while the energy produced by regular light is mostly converted in heat.
Laser light represents the energy released by atoms in form of photons, after they were electrically stimulated. Incandescent light is emitted by a filament that is electricallly heated till it starts to shine bright.
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