Beam of Light Across Universe
Name: James M.v
I am 17 years old and have gained a massive interest in
I often ask my Chemistry/Physics teachers questions when I do not
understand things (that he does not teach), but he often answers in ways
that I am not completely capable of understanding.
For instance, I asked what would happen if a laser was shot in a perfectly
straight line with no matter or energy in its path to interrupt it in
He replied that it would, in a way, reflect and return directly back to
its point of origin according to one of Einstein's theories.
Is this true? If so, why? If not, what would it do? Would it go on by
itself forever in a straight line at a constant speed?
Interesting question regarding theoretical physics.
Because matter and energy does in fact exist in the universe, this
experiment could not really be duplicated "going on and on forever".
You might try researching Einstein's theories on-line. You should find
that even in the vast emptiness of space, light is bent by massive stars
and planetary bodies. One could theorize that, due to the revolution of
the planets, if a laser could be suspended and directed toward the
emptiness of space, any moving object, in fact, could move into its
path. Conceivably, this could include Earth.
The bottom line is that due to massive objects in the universe, even light
is bent and would not continue forever and ever in a straight line, even
if travelling through the mostly empty space.
Thanks for using NEWTON!
Click here to return to the Physics Archives
Update: June 2012