Speed of waves
Brian Howie wrote:
" It was known that different frequencies travel with different speeds
on a
long cable".
Is the same in air and space?
Yes in air , and no in space.
B
Depends what you mean by "space".. perfect vacuum, sure..
But what's between the planets in the Solar System isn't a perfect
vacuum, and so, it shows dispersion due to the presence of small amounts
of ionization.
Granted, it's generally a better vacuum than you are likely to achieve
on Earth by mechanical means.
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