[Laser] photon flux for magnitude 6 stars

[F1AVYopto at aol.com]

To convert the star visual light on a single wave length is an easy way to  
get the photons number range.
It is because for the same energy, the lower  the frequency, the higher the 
photons number.
(E=hv)
A super didactic link  with automatic energy calculation program can be found 
at: 
_http://hyperphysics.phy-astr.gsu.edu/HBASE/mod2.html#c4_ 
(http://hyperphysics.phy-astr.gsu.edu/HBASE/mod2.html#c4) 
For  the energy spectrum a star has to be considering like a hot blackbody.
For a  like the sun star, the integrated energy is 1.36 kW / m^2 outside the 
Earth's  atmosphere.
The solar energy seen by the eye is roughly 0.6 KW / m^2.
_http://home.znet.com/schester/facts/solar_energy.html_ 
(http://home.znet.com/schester/facts/solar_energy.html)  
 
73 Yves F1AVY
_http://pageperso.aol.fr/YvesF1AVY/UKINDEX.html_ 
(http://pageperso.aol.fr/YvesF1AVY/UKINDEX.html)