What is the approximate value of planks constant
Answers
Answered by
2
hello dear the approximately value is 6.626 × 10^−34 joule-seconds.
Surajbabu1:
0 hoti h na
Answered by
0
The Planck constant (denoted h , also called
Planck's constant) is a physical constant
that is the quantum of action , central in
quantum mechanics.
First recognized in 1900 by Max Planck , it
was conceived as the proportionality
constant between the minimal increment of
energy , E , of a hypothetical electrically
charged oscillator in a cavity that
contained black body radiation, and the
frequency , f, of its associated
electromagnetic wave . In 1905, the value E,
the minimal energy increment of a
hypothetical oscillator, was theoretically
associated by Albert Einstein with a
"quantum" or minimal element of the
energy of the electromagnetic wave itself.
The light quantum behaved in some
respects as an electrically neutral particle,
as opposed to an electromagnetic wave. It
was eventually called photon.
Photon
The Planck–Einstein relation connects the
particular photon energy E with its
associated wave frequency f :
This energy is extremely small in terms of
ordinarily perceived everyday objects.
Since the frequency f , wavelength λ , and
speed of light c are related by ,
the relation can also be expressed as
The de Broglie wavelength λ of the particle
is given by
Where p denotes the linear momentum of a
particle, such as a photon, or any other
elementary particle.
In applications where it is natural to use
the angular frequency (i.e. where the
frequency is expressed in terms of radians
per second instead of cycles per second or
hertz ) it is often useful to absorb a factor
of 2 π into the Planck constant. The
resulting constant is called the reduced
Planck constant. It is equal to the Planck
constant divided by 2 π , and is denoted ħ
(pronounced "h-bar "):
Planck's constant) is a physical constant
that is the quantum of action , central in
quantum mechanics.
First recognized in 1900 by Max Planck , it
was conceived as the proportionality
constant between the minimal increment of
energy , E , of a hypothetical electrically
charged oscillator in a cavity that
contained black body radiation, and the
frequency , f, of its associated
electromagnetic wave . In 1905, the value E,
the minimal energy increment of a
hypothetical oscillator, was theoretically
associated by Albert Einstein with a
"quantum" or minimal element of the
energy of the electromagnetic wave itself.
The light quantum behaved in some
respects as an electrically neutral particle,
as opposed to an electromagnetic wave. It
was eventually called photon.
Photon
The Planck–Einstein relation connects the
particular photon energy E with its
associated wave frequency f :
This energy is extremely small in terms of
ordinarily perceived everyday objects.
Since the frequency f , wavelength λ , and
speed of light c are related by ,
the relation can also be expressed as
The de Broglie wavelength λ of the particle
is given by
Where p denotes the linear momentum of a
particle, such as a photon, or any other
elementary particle.
In applications where it is natural to use
the angular frequency (i.e. where the
frequency is expressed in terms of radians
per second instead of cycles per second or
hertz ) it is often useful to absorb a factor
of 2 π into the Planck constant. The
resulting constant is called the reduced
Planck constant. It is equal to the Planck
constant divided by 2 π , and is denoted ħ
(pronounced "h-bar "):
Similar questions