X-rays and computers

[Peter]

On Mon, 15 Aug 2005, Sy wrote:

> On 15/08/05, Henry Spencer <henry-lqW1N6Cllo0sV2N9l4h3zg at public.gmane.org> wrote:
>> On Sun, 14 Aug 2005, Sy wrote:
>>> I thought that the majority of x-rays produced were sent out the back
>>> of the monitor..
>>
>> No, when you smack electrons into a target, the X-rays go out the way the
>> electrons were headed -- forward.
>
> Aah, you're right.  I also did a bit of reading because I was curious
> to learn more.  =)
> http://en.wikipedia.org/wiki/X-ray

X-ray emission from a target is isotropic or nearly so. The only trick 
is that emission occurs at the surface of the target and the direction 
with highest radiation is perpendicular to this surface and away from it 
(any rays passing through the target are attenuated). The same link you 
refer to has a schematic drawing of a tube with arrows indicating the 
emerging rays.

Peter
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