Measuring Frequency of Trans Planckian Blue Shift

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SUMMARY

The discussion centers on the implications of measuring radiation frequency in relation to the Planck time interval and gravitational effects. It posits that an observer moving towards a radiation source would measure a higher frequency due to relativistic effects, while an observer in a gravitational well would measure a lower frequency. The conversation challenges the validity of the Planck time interval as the fundamental smallest time interval, suggesting that the Planck length is merely an approximate scale beyond current physics. Ultimately, it concludes that inquiries into this scale may be futile and not worth concern.

PREREQUISITES
  • Understanding of Planck time and Planck frequency
  • Familiarity with relativistic effects on frequency measurement
  • Knowledge of gravitational wells and their impact on light frequency
  • Basic concepts of quantum mechanics and theoretical physics
NEXT STEPS
  • Research the implications of relativistic Doppler effect on frequency measurement
  • Explore the relationship between gravitational fields and light frequency shifts
  • Investigate the theoretical foundations of Planck length and its significance in physics
  • Examine current theories that challenge the validity of Planck-scale physics
USEFUL FOR

The discussion is beneficial for theoretical physicists, astrophysicists, and anyone interested in the implications of quantum mechanics and relativity on fundamental physics concepts.

yuiop
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Consider a source of radiation that is emitting the radiation at the highest possible frequency inversely proportional to the Planck time interval as measured in the rest frame of the source.

What frequency would an an observer that is moving towards the source measure?
What frequency would an observer that is lower down in a gravitational well measure?

Do these sort of considerations mean we have to dismiss the idea of the Planck time interval as being the fundamental smallest time interval or equivalently the Planck frequency as being the highest possible frequency?
 
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We never had that idea in the first place.

The Planck length is only an approximate scale, at which gravity becomes as strong as the other forces. It's about 15 or 16 orders of magnitude beyond known physics, and purely hypothetical. The ideas that lead to it may well be wrong. Asking what happens at this scale in specific circumstances is meaningless, and not worth losing a nanosecond's sleep over.
 

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