From: Ron Kean (ronkean@juno.com)
Date: Thu Apr 22 1999 - 00:56:57 MDT
On Thu, 22 Apr 1999 02:11:43 -0400 "Michael S. Lorrey" <mike@lorrey.com>
writes:
>Ross A. Finlayson wrote:
>>
>> Does shooting a laser from a laser generator not generate opposite
>force
>> of the beam output?
>
>It generates a reaction. Laser propulsion is NOT reactionless
>propulsion.
>
>Mike Lorrey
>
>
An ordinary pocket laser pointer produces a beam of about 2 milliwatts
power. That's the actual electromagnetic power of the light itself, not
the electrical power drained from the batteries which power the laser. A
2 milliwatt beam would produce a reactive force on the the emitting laser
of about 6.7 trillionths of a Newton. If the beam were to strike a
perfect black body and be absorbed, the force on the black body would be
the same. If the beam were to strike a perfect mirror perpendicular to
its surface, the force on the mirror would be twice that. A Newton is a
metric unit of force, equal to the weight at sea level of about 102 grams
or about 3.6 avoirdupois ounces.
Ron Kean
.
.
.
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