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On 8/19/20 3:11 PM, Douglas Johnson wrote:
How does the " inverse square law" apply to the new weaponized laser due to
be tested soon?
most definitely. Just like Arecibo with it's 0.13 degree beamwidth -
(2.2 mrad, about like a decent HeNe laser). When I was designing a
cubesat with big antennas sticking out, we had to consider the fields -
at 500km, the 300 meter diameter beam from Arecibo hasn't spread much,
and the field was 67 V/m
But by the time you get to GEO at 37000 km, the beam has spread to 83
km, though, and it's <1 V/m.
Death rays are hard to make.
Thermal blooming and air ionization are problems for high power lasers
(and then we get David's column of plasma)
In a real "space to space" shootem up projectile weapons are your friend.
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