On 4/12/2010 1:17 PM, Orchid XP v8 wrote:
>>> Now, what kind of a picture you could make with a "light" having a 2
>>> Km wavelength, I have no idea.
>>
>> http://universe.chimons.org/contents/Radio.jpg
>
> Well, yes, they have various radio telescopes. But I wonder... these
> images are in colour, but does the colour actually represent different
> wavelengths? Or is it just the intensity of radiation being recieved?
>

depends... sometimes it is colored by wavelength, sometimes just a scale 
of intensity. In the case of that image, it looks like intensity mapping.

-- 
~Mike

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