Philosophy Dictionary of ArgumentsHome
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| Redshift: Redshift is the increase in the wavelength of electromagnetic radiation (such as light) as it travels from a source to an observer. The opposite change, a decrease in wavelength and simultaneous increase in frequency and energy, is known as a blueshift. See also Cosmology, Spacetime._____________Annotation: The above characterizations of concepts are neither definitions nor exhausting presentations of problems related to them. Instead, they are intended to give a short introduction to the contributions below. – Lexicon of Arguments. | |||
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Bernulf Kanitscheider on Redshift - Dictionary of Arguments
I 222 Redshift/Theory: ambiguous: one thought earlier that the redshift of the spectral lines of the light of the distant galaxies is a Doppler effect. This is wrong! Not the galaxies move through the space, but the space itself expands. (Therefore it is also possible that the expansion can assume superluminal speed). But then the galaxies themselves are in rest. I 223 Theory/Empirical/Kanitscheider: nevertheless, here was a real support of the theory by theory-neutral empirical data: because the linear Hubble law (whatever value the Hubble constant may have) is logically firmly connected with the uniformity of the world at large. An empirical connection was discovered without the help of those theories for which this connection should be supporting instance. From such a law of expansion follows that every galaxy can be regarded as center of such an expansion. >Universe/Kanitscheider, >Cosmological principle/Kanitscheider, cf. >Olbers paradox, >Relativity theory. I 225 Redshift/Kanitscheider: for the cosmological interpretation the wavelength independence is important. Only then the statement can be made that the measured value of z = 1 is due to a doubling of the size of space. Since Rem approaches zero at (time-inverse) approach to the initial singularity, the redshift of very old and distant objects can go beyond all limits. At t = 0, z is infinite. However, no observable corresponds to this, since redshift is also accompanied by a slowing down of all processes. Around the big bang the physical events appear frozen. I 226 Redshift/Kanitscheider: It is important to recognize that the different interpretations are not based on relationist Vs absolutist conception of space! The interpretation, according to which the redshift is caused by the expansion of space, is of course the relativistic one, but it is not only a facon de parler, but has also empirical consequences: if the redshift would be really a velocity and not an expansion effect, the energy flux S, which is measured from a galaxy of luminosity L on the earth, not S = L / 4πR²(1 + z)², but S = L / 4πr²(1 + z)². However, this is not valid for an overlapping area with very small distances, where both theories give equal values. Redshift/Kanitscheider: there is a third explanation: light fatigue by gravitational effect. Photons experience an interaction on their way, be it with atoms or with electrons, which triggers an energy loss and thus a frequency decrease. Or the photon decays into a lower energy photon and a vector boson. Vs: One can exclude such hypothesis only by comparing the consequences with the empiric: Bsp It would have to accompany by interaction with intergalactic matter also a smearing of the pictures of distant objects. This has never been observed. Even quasars are always sharply point-like. Likewise, the spectral lines would have to become broader, which has also never been observed. Moreover, the fatigue phenomenon would have to occur depending on the wavelength, that the radiophotons decay faster than the light photons. Moreover, the static universe - which is implied by this assumption - would have no place for the background radiation._____________Explanation of symbols: Roman numerals indicate the source, arabic numerals indicate the page number. The corresponding books are indicated on the right hand side. ((s)…): Comment by the sender of the contribution. Translations: Dictionary of Arguments The note [Concept/Author], [Author1]Vs[Author2] or [Author]Vs[term] resp. "problem:"/"solution:", "old:"/"new:" and "thesis:" is an addition from the Dictionary of Arguments. If a German edition is specified, the page numbers refer to this edition. |
Kanitsch I B. Kanitscheider Kosmologie Stuttgart 1991 Kanitsch II B. Kanitscheider Im Innern der Natur Darmstadt 1996 |
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> Counter arguments against Kanitscheider
> Counter arguments in relation to Redshift
Ed. Martin Schulz, access date 2024-04-20