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Re: MARS
>> Eh, Kevin why do you think that micro waves are called MICRO waves? Assuming
>> you see what I mean, I think that you agree that such big holes are not
allowed.
>
>Ah, Tim, i was asusuming that a good frequency for the maser would be
>21cm. as the ship approached earth on it's return flight, it would have
>a gamma of about seven, so the wavelength would be reduced by seven times
>to about 3 cm. All other portions of the trip would have longer wave-
>lengths, or at least, no significant change. I always assumed that they
>were called _micro_ waves, because compared to radio waves (which can be
>in the 1 meter range), 21 cm seems very small indeed.
Damn, you are right (almost). I checked a dictionary and it says microwaves
is EM-radiation with wavelengths between 1 cm and 1 mm.
>Microwaves have longer frequencies than IR, and i know that IR is about
>1 cm or shorter.
You are almost right again, <1 mm.
I'm sorry for my wrong correction. So indeed a reflecting mesh could have
holes with a size of about a centimetre.
Timothy
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