LASER --
The structure of the laser & the relationship
between the laser and atoms. Stimulated and
Spontaneous radiations.
Spontaneous emission : This is how the Bhor model explains the
phenomenon of light radiation in a superheated body. When heating an object,
the atoms that make it up receive additional energy, due to which the electrons
of the atom move from the nucleus to a more distant orbit. This event is called
the “excited” state of an atom. However, the atom cannot stay in an excited state
for a long time; it returns to its stable state, radiating the additional energy it
receives. Since in a heated body, the atom takes on an excited state and its
radiation occurs spontaneously, this radiation is called spontaneous radiation.
Spontaneous radiation becomes irregular; light radiation occurs at different
frequencies in different directions. Therefore, this type of radiation is weak.
Radiation such as an electric lamp, candle, rainbow, bonfire, sun, or polar glow
occurs spontaneously.
Stimulated emission : In 1919, US scientist Albert Einstein proposed the idea
that atoms excited by the action of light falling on them radiate visible light.
• The transition of an atom from an upper energy level to a lower energy level not
spontaneously (spontaneously) but under external influence, is called stimulated
emission.
In 1954, Russian physicists N. Basov and A.Prokhorov, and US scientist Charles
Towns developed the first generator, the principle of operation based on forced
radiation, to amplify electromagnetic waves.
In 1960, the US scientist Theodore Maiman, on the other hand, received regular
and controlled light radiation - a laser, which was amplified to a very large
frequency and energy as a result of forced radiation.
The structure of the laser & the relationship
between the laser and atoms. Stimulated and
Spontaneous radiations.
Spontaneous emission : This is how the Bhor model explains the
phenomenon of light radiation in a superheated body. When heating an object,
the atoms that make it up receive additional energy, due to which the electrons
of the atom move from the nucleus to a more distant orbit. This event is called
the “excited” state of an atom. However, the atom cannot stay in an excited state
for a long time; it returns to its stable state, radiating the additional energy it
receives. Since in a heated body, the atom takes on an excited state and its
radiation occurs spontaneously, this radiation is called spontaneous radiation.
Spontaneous radiation becomes irregular; light radiation occurs at different
frequencies in different directions. Therefore, this type of radiation is weak.
Radiation such as an electric lamp, candle, rainbow, bonfire, sun, or polar glow
occurs spontaneously.
Stimulated emission : In 1919, US scientist Albert Einstein proposed the idea
that atoms excited by the action of light falling on them radiate visible light.
• The transition of an atom from an upper energy level to a lower energy level not
spontaneously (spontaneously) but under external influence, is called stimulated
emission.
In 1954, Russian physicists N. Basov and A.Prokhorov, and US scientist Charles
Towns developed the first generator, the principle of operation based on forced
radiation, to amplify electromagnetic waves.
In 1960, the US scientist Theodore Maiman, on the other hand, received regular
and controlled light radiation - a laser, which was amplified to a very large
frequency and energy as a result of forced radiation.
