# infinite blue shift

**URL:** <https://boards.straightdope.com/t/infinite-blue-shift/59846>\
**Category:** Factual Questions\
**Created:** [March 28, 2001, 4:45pm UTC](https://boards.straightdope.com/t/infinite-blue-shift/59846 "2001-03-28T16:45:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Enola\_Straight](https://avatars.discourse-cdn.com/v4/letter/e/dec6dc/32.png) [@Enola\_Straight](https://boards.straightdope.com/u/Enola_Straight)\
**Post date:** [March 28, 2001, 4:45pm UTC](https://boards.straightdope.com/t/infinite-blue-shift/59846/1 "2001-03-28T16:45:59Z")

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I was talking to a college professor of physics about black holes, and the topic was electromagnetic emissions. Due to infinite gravity, the light is infinitely red-shifted to zero cycles per second, at which point the photons essentialy cease to exist.  
I know that higher energies create higher frequencies  
(x-rays, gamma rays,cosmic rays…). Is it possible for a frequency of one cycle per Planck Interval to exist?  
And what could create such a frequency?

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<div class="post-metadata">

**Author:** ![Enola\_Straight](https://avatars.discourse-cdn.com/v4/letter/e/dec6dc/32.png) [@Enola\_Straight](https://boards.straightdope.com/u/Enola_Straight)\
**Post date:** [March 28, 2001, 11:18pm UTC](https://boards.straightdope.com/t/infinite-blue-shift/59846/2 "2001-03-28T23:18:34Z")

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Could this “Planck Frequency” arise from a matter/antimatter reaction, or from a theoretical  
interaction of a black hole and a white hole?