Hai friends:
Welcome to the Quantum World where physics has its own laws which deviates from the one we studied in our higher secondary text books. Before going deep into the quantum world, let
us define its threshold point. To start with let's see the difference between the continuous and discrete signal. A Discrete signal is defined at particular instances of time whereas a continuous signal on the other hand is defined at
all instances of time. But is it so? Is it possible to define them for a period
less than 10^-43 seconds or 10^-35 metres of length. The answer is definite NO.
Things act weird and wild in the quantum world. This distance, 1.616199 × 10−35 m
in precise, is called Planck’s length. It is defined by Max Planck which can be
defined from three fundamental constants: the speed of light in a vacuum, Planck's constant, and the gravitational constant. The Planck length is about 10−20
times the diameter of a proton, and thus is exceedingly small,
it is considered the smallest length known/possible.
There is currently no directly
proven physical significance of the Planck length; it is, however, a topic of
research. Because the Planck length is so many orders of magnitude smaller than
any current instrument could possibly measure, there is currently no way of
probing this length scale directly. Research on the Planck length is therefore
mostly theoretical. According to the generalized uncertainty principle, the
Planck length is in principle, within a factor of order unity, the shortest
measurable length – and no improvements in measurement instruments could change
that.
The Planck length is the square
root of the Planck area, which is the area by which a spherical black hole increases when the black hole
swallows one bit of information. The Planck length is the length scale at which
the structure of space time becomes dominated by quantum effects, and it would
become impossible to determine the difference between two locations less than
one Planck length apart. The size of the Planck length can be visualized as
follows. If a particle or dot about 0.1mm in size (which is at or near the
smallest the unaided human eye can see) were magnified in size to be as large
as the observable universe, then inside that universe-sized
"dot", the Planck length would be roughly the size of an actual 0.1mm
dot, that is, about the size of smallest object the naked human eye can see. In
other words, the diameter of the observable universe is to within less than an
order of magnitude, larger than a 0.1 millimeter object, roughly at or near the
limits of the unaided human eye, by about the same factor (10^31) as
that 0.1mm object or dot is larger than the Planck length. More simply - on a
logarithmic scale, a dot is halfway between the Planck length and the size of
the universe. If we could travel deeper beyond this halfway we halt at the Planck's length. Planck's length is where all actions stop. No Physics, No actions, Nothing..
Physics is not yet determined nor
predicted beyond this length. The Nature is yet to unfold its secrets beyond
this scale.
If Planck’s length is the
smallest known what would be the building block of the universe then????. Wait until
my next post.
P.S: requesting your valuable
comments…..
Baluu
