physics

John Hartnett (physicist)

John Hartnett (physicist) is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand John Hartnett (physicist) rather than just read about it. In short: John G. Hartnett (born 24 March 1953 in Manjimup, Western Australia), is an Australian young Earth creationist and cosmologist.

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Reference excerpt

John G. Hartnett (born 24 March 1953 in Manjimup, Western Australia), is an Australian young Earth creationist and cosmologist. He has been active with Creation Ministries International and is known for his opposition to the Big Bang theory and criticism of the dark matter and dark energy hypotheses. He received both his BSc (Hons) (1973) and PhD with distinction (2001) from the School of Physics at the University of Western Australia (UWA). He currently works as a Research Fellow at the University of Adelaide, South Australia. He has published more than 200 papers in scientific journals, book chapters and conference proceedings, holds one patent, works on the development of ultra-stable cryocooled sapphire oscillators and participated on a Sapphire Clock Ensemble project (Atomic Clock Ensemble in Space Mission) run by the European Space Agency. He also has written articles for several creationist journals and, according to Creation Ministries International, Hartnett "believes that God is the real creator of the universe as the Bible says."

Research interests His research interests include ultra low-noise radar and ultra high stability cryogenic microwave oscillators and clocks based on a pure single-crystal sapphire resonators. Applications for the latter are to provide low noise local oscillators to atomic physics labs, time and frequency atomic fountain standards, and very high frequency VLBI (Very-Long-Baseline-Interferometry) radio-astronomy. The terrestrial clock technology co-developed by him is claimed to be the most stable in the universe, with Hartnett et al. stating that it outperformed the stability of signals generated by pulsars (rotating neutron stars that produce highly periodic bursts of radio waves; such astronomical sources are then used as natural clocks e.g. for tests of physics). Further on, he is interested in the development of cryocooled CSO resonators, detection of WISPs using low noise microwave techniques, tests of the fundamental theories of physics, such as special and general relativity, measurement of drift in fundamental constants and their cosmological implications and cosmology and the large scale structure of the universe. He is also part of a team of scientists who are building liquid helium-cooled oscillators used by sapphire clocks for the National Metrology Institute of Japan in Tsukuba, Japan. According to Moshe Carmeli, Professor of Theoretical Physics at Ben Gurion University in Beer Sheva, Israel, Hartnett asserted in his theory that there is no need to assume the existence of dark matter in the universe.

Publications John Hartnett is the author of the book "Starlight, Time and the New Physics" (2007). and co-author of the book "Dismantling the Big Bang".

Hartnett, J.G. (June 2006). "The distance modulus determined from Carmeli's cosmology fits the accelerating universe data of the high-redshift type Ia supernovae without dark matter". Foundations of Physics. 36 (6): 839–861. arXiv:astro-ph/0501526. Bibcode:2006FoPh...36..839H. doi:10.1007/s10701-006-9047-y. S2CID 119334725. Hartnett, J.G. (November 2006). "Spiral galaxy rotation curves determined from Carmelian general relativity". Int. J. Theor. Phys. 45 (11): 2118–2136. arXiv:astro-ph/0511756. Bibcode:2006IJTP...45.2118H. doi:10.1007/s10773-006-9178-0. S2CID 5242732. Hartnett, J.G.; Tobar, M.E. (November 2006). "Properties of gravitational waves in Cosmological general relativity". Int. J. Theor. Phys. 905 (11): 2181–2190. arXiv:gr-qc/0603067. Bibcode:2006IJTP...45.2181H. doi:10.1063/1.2736982. S2CID 6475708. Hartnett, J.G.; Oliveira, F.J. (18 March 2006). "Carmeli's cosmology fits data for an accelerating and decelerating universe without dark matter or dark energy". Found. Phys. Lett. 19 (6): 519–535. arXiv:astro-ph/0603500. Bibcode:2006FoPhL..19..519O. doi:10.1007/s10702-006-1007-4. S2CID 14967103. Retrieved 18 November 2011. Hartnett, J.G.; Oliveira, F.J. (2007). "Luminosity distance, angular size and surface brightness in Cosmological General Relativity". Found. Phys. 37 (3): 446–454. Bibcode:2007FoPh...37..446H. doi:10.1007/s10701-007-9108-x. S2CID 120756047. Hartnett, J.G. (2008). "Spheroidal and elliptical galaxy radial velocity dispersion determined from Cosmological General Relativity". Int. J. Theor. Phys. 47 (5): 1252–1260. arXiv:0707.2858. Bibcode:2008IJTP...47.1252H. doi:10.1007/s10773-007-9558-0. S2CID 119683015. Hartnett, J.G. (2008). "Extending the redshift-distance relation in Cosmological General Relativity to higher redshifts". Found. Phys. 38 (3): 201–215. arXiv:0705.3097. Bibcode:2008FoPh...38..201H. doi:10.1007/s10701-007-9198-5. S2CID 15943391. Hartnett, J.G.; K. Hirano (2008). "Galaxy redshift abundance periodicity from Fourier analysis of number counts N(z) using SDSS and 2dF GRS galaxy surveys". Astrophysics and Space Science. 318 (1–2): 13–24. arXiv:0711.4885. Bibcode:2008Ap&SS.318...13H. doi:10.1007/s10509-008-9906-4. S2CID 16564483. Hartnett, J.G. (2013). "A valid finite bounded expanding Carmelian universe without dark matter". International Journal of Theoretical Physics. 52 (12): 4360–4366. arXiv:astro-ph/0508367. Bibcode:2013IJTP...52.4360H. doi:10.1007/s10773-013-1753-6. S2CID 118061478.

Patents P1 "Temperature Compensated Oscillator"; US Patent Number 7,046,099, issued 16 May 2006. Obtained from US patent search.

References

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Worked examples

Example 1 — a first encounter with John Hartnett (physicist)

Start with the simplest possible case. Write down what John Hartnett (physicist) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to John Hartnett (physicist) before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about John Hartnett (physicist) ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of John Hartnett (physicist)

In research: John Hartnett (physicist) appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses John Hartnett (physicist) in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: John Hartnett (physicist) is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1952 births, 20th-century Australian male writers, 20th-century Australian non-fiction writers, so understanding it makes those chapters shorter.
In everyday life: Look for John Hartnett (physicist) outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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Frequently asked questions

What is John Hartnett (physicist) in simple terms?

John G. Hartnett (born 24 March 1953 in Manjimup, Western Australia), is an Australian young Earth creationist and cosmologist.

Why does John Hartnett (physicist) matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study John Hartnett (physicist)?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on John Hartnett (physicist).