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On the Test of Time Dilation Using the Relativistic Doppler Shift Equation

Author:

Kassir, Radwan M.

Category:

Research Papers

Sub-Category:

Relativity Theory

Language:

English

Date Published:

December 5, 2014

Downloads:

259

Keywords:

Special Relativity, relativistic Doppler Effect, Ives–Stilwell, time dilation test, time contraction.

Abstract:

In a recent research study entitled “Test of Time Dilation Using Stored Li+ Ions as Clocks at Relativistic Speed” (Phys. Rev. Lett. 113, 120405 – Published 16 September 2014), an Ives–Stilwell type experiment, it was claimed that a conducted time dilation experiment using the relativistic Doppler effect on the Li+ ions resonance frequencies had verified the relativistic frequency shift formula, thus indirectly proving the time dilation. The test was based on the validation of an algebraic equality relating a set of measured frequencies, deduced from the relativistic Doppler equations. In this study, it was shown that this algebraic equality did not uniquely imply the validity of the relativistic Doppler equations. In fact, it was revealed that an infinite number of frequency shift equations would satisfy the employed validation criterion. Nonetheless, it was shown that even if that claim was hypothetically accepted, then the experiment would prove nothing but a contradiction in the Special Relativity prediction. In fact, it was clearly demonstrated that the relativistic blue shift was the consequence of a time contraction, determined via the light speed postulate in the case of an approaching light source. It was also shown that the classical relativity resulted in perceived time alterations leading to the classical Doppler Effect equations. The “referenced study” result could be attributed to the classical Doppler shift within 10 % difference.

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