Theory
in sentence
2204 examples of Theory in a sentence
And the leading version of string
theory
predicts a multiverse made of up to 10 to the 500 universes.
But quantum
theory
adds a whole new wrinkle.
I mean, the
theory'
s been proven true beyond all doubt, but interpreting it is baffling.
By late 1860, Avogadro was proven correct, and his work helped lay the foundation for the atomic
theory.
My lungs reach residual volume, below which they're not supposed to be compressed, in
theory.
It took over a thousand years before the Arab scientist, Alhazen, figured out that the old, Greek
theory
of light couldn't be right.
Alhazen's
theory
accounts for a fact that the Greek's couldn't easily explain: why it gets dark sometimes.
This result, that light sometimes behaves like a particle and sometimes behaves like a wave, led to a revolutionary new physics
theory
called quantum mechanics.
Albert Einstein used non-Euclidean geometry as well to describe how space-time becomes warped in the presence of matter, as part of his general
theory
of relativity.
Worse still, the
theory
was wrong.
This
theory
is simple and elegant, and it has the advantage over the earth, air, fire, and water
theory
of being right.
In Leucippus's theory, the atom is the smallest, indivisible bit of stuff that's still recognizable as hydrogen, carbon, or iron.
We don't know, but there's one theory, called <i>supersymmetry</i>, that could explain some of it.
And then, Newton proposed the
theory
of universal gravitation, demonstrating that all objects are pulling on each other.
According to this theory, all matter in the universe was once a singular, infinitely dense particle.
But this
theory
eliminates the whole idea of a center since there can't be a center to an infinite universe.
This can be explained by Darwin's
theory
of evolution.
This was an earlier, now discredited,
theory
of evolution.
A hundred years ago this month, a 36-year-old Albert Einstein stood up in front of the Prussian Academy of Sciences in Berlin to present a radical new
theory
of space, time and gravity: the general
theory
of relativity.
General relativity is unquestionably Einstein's masterpiece, a
theory
which reveals the workings of the universe at the grandest scales, capturing in one beautiful line of algebra everything from why apples fall from trees to the beginning of time and space.
One was Einstein's
theory
of relativity, the other was arguably even more revolutionary: quantum mechanics, a mind-meltingly strange yet stunningly successful new way of understanding the microworld, the world of atoms and particles.
One of the most important consequences of Einstein's general
theory
of relativity was the discovery that the universe began as a rapid expansion of space and time 13.8 billion years ago, the Big Bang.
Now, according to early versions of the Big Bang theory, the universe has been expanding ever since with gravity gradually putting the brakes on that expansion.
The hope was that a complete combination of Einstein's general
theory
of relativity, which is the
theory
of the universe at grand scales, with quantum mechanics, the
theory
of the universe at small scales, might provide a solution.
Einstein himself spent most of his later years on a futile search for a unified
theory
of physics, and physicists have kept at it ever since.
One of the most promising candidates for a unified
theory
is string theory, and the essential idea is, if you could zoom in on the fundamental particles that make up our world, you'd see actually that they're not particles at all, but tiny vibrating strings of energy, with each frequency of vibration corresponding to a different particle, a bit like musical notes on a guitar string.
It turns out that string
theory
isn't one
theory
at all, but a whole collection of theories.
It's been estimated, in fact, that there are 10 to the 500 different versions of string
theory.
Now, critics say this makes string
theory
unscientific.
You can't disprove the
theory.
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