Re: Do light have velocity dependent trajectories?
- From: "Sue..." <suzysewnshow@xxxxxxxxxxxx>
- Date: 22 Feb 2007 04:02:55 -0800
On Feb 22, 6:33 am, j...@xxxxxxxx wrote:
Given a X,Y,Z cordinate system with "earth in origo" a spaceship "A"
travels along X axis in a
velocity close to c.
Assuming the side of spaceship is along the Y
axis and a pulsecanon is aligned along Y(side of ship) it fire a
pulse
of one Plank length in a straight line along Y.
1. What will the actual trajectory of the pulse be?
(will it not at all be affected by the ships trajectory and travel in
a straight line along Y, i have a hard time to imagine it travelling
in a straight line parallell with ship c along the X axis but maybe
it
will?) or maybe it will take have a trajectory like a ball thrown
from
a car left side but that would be a velocity dependent trajectory
dependent on ~c and c?
2. Maybe a very stupid question, is it possible for the pulse(given a
light pulse) to expand not only in a positive direction from the
pulse
canon?
Maybe it is not quite clear what i mean, must the pulse always travel
positive from the emitter given a light or radio pulse, even if the
emitter is an object moving at ~c.
Could anyone be so kind make plot the trajectorie for me assuming
planet earth at rest in origo and ship travel positive along x-axis.
The ship passing origo "earth frame t0 sec" firing pulse postive in y-
axis
could anyone plot out for me "ship" and "pulse front" respective
origo
"earth frame t1 sec".
Where is lightpulse with respect to origo "earth" anyone?
The ship travels very close to ~c let us say indistinguasable.
I would also like to know how the trajectory would look in 0.9 0.8
0.7
0.6 c ...... and so on if someone got the time.
Best regards JT
A light path is determined by the matter in the region.
Usually classified as a conductor or a dielectric.
Propagation in a dielectric medium
http://farside.ph.utexas.edu/teaching/em/lectures/node98.html
http://en.wikipedia.org/wiki/Wave_impedance
http://en.wikipedia.org/wiki/Free_space
http://www-ssg.sr.unh.edu/ism/what.html
<<Now, does not the prize to Einstein imply
that the Academy recognised the particle
nature of light? The Nobel Committee says
that Einstein had found that the energy exchange
between matter and ether occurs by atoms emitting
or absorbing a quantum of energy,hv .
As a consequence of the new concept of light quanta
(in modern terminology photons) Einstein proposed the
law that an electron emitted from a substance by
monochromatic light with the frequency has to have
a maximum energy of E=hv-p, where p is the energy needed to
remove the electron from the substance. Robert Andrews
Millikan carried out a series of measurements over a
period of 10 years, finally confirming the validity of this
law in 1916 with great accuracy. Millikan had, however,
found the idea of light quanta to be unfamiliar and strange.
The Nobel Committee avoids committing itself to the
particle concept. Light-quanta or with modern terminology,
photons, were explicitly mentioned in the reports on
which the prize decision rested only in connection with
emission and absorption processes. The Committee says
that the most important application of Einstein's photoelectric
law and also its most convincing confirmation has come from
the use Bohr made of it in his theory of atoms, which explains
a vast amount of spectroscopic data. >>
http://nobelprize.org/physics/articles/ekspong/index.html
Sue...
.
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