"dlm" <me### [at] addressinvalid> wrote in message news:4238a729$1@news.povray.org...
> Hi,
> A lot of the appearance depends on how long it is from detonation.
> http://www.cddc.vt.edu/host/atomic/nukeffct/enw77b1.htm
> States:
>
> 2.05 The surface temperatures of the fireball, upon which the brightness (or
> luminance) depends, do not vary greatly with the total energy yield of the
> weapon. Consequently, the observed brightness of the fireball in an air
> burst is roughly the same, regardless of the amount of energy released in
> the explosion. Immediately after its formation the fireball begins to grow
> in size, engulfing the surrounding air. This growth is accompanied by a
> decrease in temperature because of the accompanying increase in mass. At the
> same time, the fireball rises, like a hot-air balloon. Within seven-tenths
> of a millisecond from the detonation, the fireball from a 1-megaton weapon
> is about 440 feet across, and this increases to a maximum value of about
> 5,700 feet in 10 seconds. It is then rising at a rate of 250 to 350 feet per
> second. After a minute, the fireball has cooled to such an extent that it no
> longer emits visible radiation. It has then risen roughly 4.5 miles from the
> point of burst.
>
>
>
> and continues to describe color effects etc ...

hey, that's interesting! thanks!!

cu!
--
camera{location-z*3}#macro G(b,e)b+(e-b)*(C/50)#end#macro L(b,e,k,l)#local C=0
;#while(C<50)sphere{G(b,e),.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1
;#end#end L(y-x,y,x,x+y)L(y,-x-y,x+y,y)L(-x-y,-y,y,y+z)L(-y,y,y+z,x+y)L(0,x+y,
<.5,1,.5>,x)L(0,x-y,<.5,1,.5>,x)               // ZK http://www.povplace.be.tf

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