Difference between Ordinary light and Laser light

Following are the major difference between Ordinary lights and Laser lights

Laser light

Ordinary light

Laser lights are highly coherent Ordinary lights are incoherent in nature..
There coherence length as of the order of few km (Kilometer). There coherence length as of the order of few mm (Millimeter).
It is travel in only one direction, which is parallel to the optic axis. Intensity of ordinary light decreases with distance as it travels in form of short pulses of small length and short duration.
It is highly monochromatic as it travels in form of large length and long duration. It is not strictly monochromatic as it travels in form of short pulses of small length and short duration.
Spread of plane wave front is less hence they spread least i.e. their divergence is less. Spread of spherical wave font is more hence they spread heavily i.e. their divergence is more

Laser Light Beam

Laser Light Beam

Ordinary light

Ordinary light

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