green laser pointer has been used

What does the 2.4MHz on the green laser pointer mean?Read the restore, all the information – to restore the amplitude and phase reading, the need to laser irradiation under the principle of the use stripes to reproduce the diffraction images of laser holographic information storage capacity of the advantages of information storage capacity of up to — — up 1Tb/cm3 up 1Tb/cm3 record speed record information is not easily lost – - Life is not easy to record information up to a few hundred up to several hundred missing — life — for long term preservation of each fragment contains the complete information for long term preservation — What’s the meaning of 315MHz on the green laser pointer body?Each fragment contains the complete information to facilitate the copy, easy to copy , copy volume holographic information storage volume holographic information storage principle
48-year-old 48-year-old American National Standards Institute American National Standards Institute W ? D ? Phillips (WD ? Phillips Phillips (W Phillips) in recognition of their methods of led flash light cooling of atoms and capture the outstanding contributions made on 1917, Einstein in the black-body radiation article in 1917, Einstein blackbody radiation in the article pointed out: the spontaneous emission process of momentum transfer will be 1933, Friis (Frisch) observed: sodium light 1933, Friis (Frisch) observed: sodium light sodium atomic beam, beam of sodium atoms make a slight deflection;
When the atomic velocities close to zero when the atomic velocities close to 0, will be captured in a small area, small area, all caused by the thermal motion of atoms Jiaduopule line broadening, collision broadening, transit broadening , width (Doppler broadening, collision broadening, transit broadening, widening the theory of relativity, etc.) will be eliminated. Relativistic broadening, etc.) will be eliminated. Only by the atomic spectrum of the quantum nature of the transition energy levels of the natural broadening. A level transition from the quantum nature of the natural broadening. At the same time zone can be captured by the atomic field observations of time to improve the sensitivity and accuracy of observation.