UNCERTAINTY PRINCIPLE AND THE GAMMA RAY LIMIT

James Constant
grav@coolissues.com

The Large Scale Uncertainty Principle Prevents a Gravitational Theory From Making Absolute Statements of Its Predictions at or Near Its Singularities

         Until the statement of the uncertainty principle by Heisenberg in 1927, modern physics held to that idea of a classical determinism, and the rejection of such determinism became a cause for descent between Einstein (as a believer in a classical determinism) and Bohr and the other supporters of the quantum revolution. On the scale of atoms and elementary particles the effect of the uncertainty principle is very important. Because of the uncertainties existing at this level, a picture of the sub-microscopic world emerges as one of statistical probabilities rather than measurable certainties. On the large scale it is still possible to speak of causality in a framework described in terms of space and time; on the atomic scale this is not possible. Such a description would require exact measurements of such quantities as position, momentum, energy, and time, and these quantities cannot be measured exactly because of the uncertainty principle. It does not limit the accuracy of single measurements, of non-simultaneous measurements, or of simultaneous measurements of pairs of quantities other than those specifically restricted by the principle. Even so, its restrictions are sufficient to prevent scientists from being able to make absolute predictions about future states of the system being studied.1

        The early founders of quantum mechanics believed that the following energy-time uncertainty relation holds: DEDt>h which says that a state which has an accurate energy (time) has an inaccurate time (energy).

Large Scale Uncertainty Principle

        The uncertainty principle is concerned with measurements of position r, momentum p, energy E and time t of objects and their corresponding uncertainties Dr,Dp,DE,Dt. Generally, all quantities are available within the scope of classical and quantum mechanics. At extremely long galactic distances measurements become less deterministic and more uncertain giving rise to a large scale uncertainty principle.

        At any scale, an uncertainty principle is obtained from the universal properties of all waves

                                                                      (1)

in which Dt=time uncertainty, Dv=frequency uncertainty, Dx=position uncertainty, and Dk=momentum uncertainty.3 Equations (1) represent the uncertainty principle of waves, such as light from a galaxy, traveling through an instrument. The small scale uncertainty principle is obtained by combining equations (1) with the Einstein de-Broglie relations E=hv and p=hk=h/l to obtain the Heisenberg relations of quantum mechanics

                                                                          (2)

        Unfortunately, because of a lack of galactic Einstein de-Broglie relations, a large scale uncertainty principle while easy to conceptualize is difficult to express as a predictive theory like quantum mechanics. Basically, we receive light from a galaxy and measure frequency v with uncertainty Dv and deduce doppler speed v from the formula4

                                                                                        (3)

in which v=received frequency, vo=source frequency, v=speed, c=velocity of light and, we measure flux F with uncertaintyDF and deduce distance r from the formula5

                                                                                           (4)

in which F=flux (watts/cm2), L=luminosity (watts), r=ct=distance.

        In classical mechanics, the main uncertainties are instrument uncertainties but in large scale galactic measurements, the main uncertainties are source uncertainties. In practice, the measurement of equations (3) and (4) assume that vo=source frequency and L=luminosity are known constants. However, vo=source frequency must change as atomic energy levels change with speed and, as distance increases L=luminosity becomes more uncertain and dependent on the logical chain whereby numerical distances are measured.6 With these assumptions, the large scale uncertainty principle is expressed by equation (1) which states that the simultaneous measurement of time and frequency and thus of doppler speed and distance cannot determine the exact values of time t and frequency v. Instead, the precision of measurement is inherently limited by equation (1). In practice, measurements of time t and frequency v are made non simultaneously which reduces the product DtDv and makes it more likely to violate the uncertainty principle equation (1).

        In practice, to reduce uncertainties, measurements are made non simultaneously. The measurement of frequency uncertainty at time 1 and distance uncertainty at time 2 are obtained directly from the first of equations (1)

                                                              (5)

in which frequency uncertainty Dv1is reduced by increasing time uncertainty Dt1^, and distance uncertainty Dr2 is reduced by increasing frequency uncertainty Dv2^. The result is

                                                                                    (6)

which may, or may not satisfy the uncertainty principle DrDv>c/4p but certainly must still satisfy

                                                                                    (7)

        Non simultaneous measurements, therefore, violate the uncertainty principle especially when dv1Dr2~c/4p and also because speed and distance change in time. For the best possible accuracy, simultaneous measurements of frequency and time are required.

Gamma Ray and Optical Measurement Limits

        The highest frequencies and shortest wavelengths known in nature and practically available for measurements are gamma rays. Typical values for gamma rays are v=1021/s and lamda=3x10-11cm. This is the gamma ray measurement limit. In practice measurement instruments are most easily realized at (and below) optical frequencies with typical values for optical frequencies v=1015/s and lamda=3x10-5cm. This is the optical measurement limit. The gamma ray measurement limit is a theoretical limit and the optical limit is a practical limit of our means and ability to measure the frequency and wavelength of galaxies at all distances. That gamma rays are the highest observed frequencies and shortest observed wavelengths suggest that their measurement is also a limit on theory confirmation.

        A scientific theory is speculation unless its assumptions can be confirmed by measurements limited by our means and ability to make measurements consistent with the gamma ray and optical measurement limits and the uncertainty principle. Newton's theory and Quantum Mechanics are examples of theories abundantly confirmed by actual measurements made on Earth over a wide range of large and small distances, respectively. Theories of ultimate cosmic distances and ultra short subatomic distances are more problematic because they cannot be confirmed by measurements made on Earth. While it appears that we may never achieve the means and ability to make measurements and confirm theories in these extreme regions, confirmable theories on Earth are presumed as credible theories in cosmology.

        At ultimate distances cosmology theories fall apart because beyond some distance, roughly at the high end of Hubble's linear law, they violate the gamma ray and optical measurement limits and the uncertainty principle. Measurements, required for capturing signals of galaxy frequency and distance, make predictions increasingly uncertain if not impossible as distance increases. Since the Planck length is substantially short of the optical limit lamdap<<lamdao, theories of quantum gravity based on the Planck length are in violation of the optical measurement limit because measurements are impossible.

        Even assuming arguendo that the gamma ray limit is not the ultimate measurement limit for a confirmable theory, a theory which fails the uncertainty principle is baseless theory. For sure, a theory cannot make absolute statements from its predictions near its singularities. The Big Bang, Black Hole, Newton's law singularities (infinitely small distance infinite energy), and the Steady State Universe (infinite distance infinite energy) cannot be found consistent with that principle in any meaningful way.

        Singularities are at odds with everything else in physics, quantum mechanics and cosmology. Consider a theory which has a singularity with infinitely short r,Dr and infinitely long v,Dv. In the limit Dr--->0 and Dv--->00 which makes the product DvDr indeterminate. The theory violates the uncertainty principle at and near its singularity. As example, from classical theory, the formula for gravitational frequency shift is

                                                             (8)

in which v=photon frequency at distance r, vo=photon frequency at distance r=º, M=mass, and vg=gamma ray frequency. Inequality v<vg is dictated by the fact that gamma rays are the highest known frequencies from space on Earth. If m/r>>1, as the case might be as r--->0, equation (8) becomes v/vo=m/r>>1, and

        GM/c2>>r             M=Mo/(1-(v/c)2)1/2                                            (9)

in which mass M is related to speed and thus to frequency by equation (3) and distance r is related to flux F equation (4) and thus to time by r=ct. On Earth M=Mo and mu/r<<1. However, the measurement of equation (9) on receding galaxies, where mu/r>>1 is assumed likely, must satisfy the uncertainty principle

                                                                                        (10)

which precludes a singularity as r --->0. In other words, we cannot assume that mu/r>>1 physically exists, as a singularity in mathematical equation (8), because as r--->0 the Drmeasurement becomes infinitely small and, to satisfy equation (10), the Dv measurement becomes infinitely large, an impossibility since means and ability of measurement become impossible. Uncertainty principle equation (10), therefore, limits what we can say about gravitational frequency shift equation (8) at or near its singularity. Note that on Earth, r>=r Earth's radius so that the limit is physical not the uncertainty principle. In galaxies, physical limits disappear as mass M converts to energy.

        Near the singularity of equation (8), Dr becomes infinitely small and Dv becomes infinitely great so that, since GH/c^2 is a fixed number, at some point

                                                             (11)

so that

                                                                                    (12)

in which, if k=c the square root term is Planck's length whose value is 1.61x10-33cm. Such uncertainty is pure speculation because the means and ability of measurement of Dr at such small distances are impossible. The theory of equation (8) is confirmable on Earth and is credible on receding galaxies but, absent a physical limit, fails at its mathematical singularity as r--->0.

        Equation (12) is a condition for photons not escaping from matter in the form of energy. However, because actual measurements are impossible, we can never know if the uncertainty k>c/4p is satisfied near the singularity. Accordingly, a credible theory deduced from measurements on Earth, cannot make absolute statements from its predictions at or near its singularities.


1 See Uncertainty Principle at http://www.questia.com/library/encyclopedia/uncertainty-principle.jsp
2 See Energy-Time Uncertainty Principle at http://en.wikipedia.org/wiki/Uncertainty_principle
3 Robert Eisberg and Robert Resnick, Quantum Physics, John Wiley & Sons, Inc., 1974 page 83
    equations (3-14) and (3-15). 
4 Fred Hoyle, Astronomy and Cosmology, W. H. Freeman & Co., 1975 page 237
5 Fred Hoyle, above page 42
6 Fred Hoyle, above page 359

Copyright © 2008 by James Constant

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