Sun, Mar 22, 2009
Aero-Terms!
Aero-Terms are designed to be a daily reminder of the terms,
names, acronyms and explanations of the unique language that
populates the aviation world. Aerospace, sport aviation, fixed
wing, helo, you name it... it's all fair game.
Aero-Terms should serve as a quick but intriguing reminder of
the terms you may use every day, or an introduction to an aspects
of the Aero-World you may not yet be familiar with. ANN also
encourages readers to go beyond the FMI link, and further research
any intriguing terms.
Suggestions
for future Aero-Terms are ALWAYS welcome, as are
additions or discussion of the explanations given for each
Aero-Term.
Aberration Of
Light
The aberration of light is a phenomenon in which light appears
to be slanted (the angle at which the light appears to be coming is
different than the angle at which it's actually coming) if the
observer is in motion. (An analogous situation is watching rain
fall from a moving train - although a raindrop is falling straight
to the ground, it will appear to fall at a slant, and the slant
increases as the train's speed increases.) The aberration of light
is due to the fact that light travels at a finite speed (as do the
raindrops). The aberration of light was discovered and demonstrated
by James Bradley (an English amateur astronomer) in 1725. The
discovery of the aberration of light was one of the first proofs
that the speed of light was finite; it also provided an early
estimate of the speed of light (Bradley calculated that the time it
took for light to travel from the Sun to the Earth was 8 minutes
and 12 seconds).
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