Photon's puzzle. / by Socratus /

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Photon's puzzle. / by Socratus /
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1) When photon travel  '' with absolute constant velocity its wavelength is infinite.''

https://www.pa.msu.edu/courses/1997spring/PHY232/lectures/quantum/photons.html

2)  Photon can have short  wavelengths  ''as photons with higher energy'' and
photon also can have long wavelengths.

https://www.pa.msu.edu/courses/1997spring/PHY232/lectures/quantum/photons.html

Does somebody can explain: how photon can change its  infinite wavelength ( !)
  to another wavelengths:  short or long ?
  Thanks
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  Is a single photon also a Maxwellian wave?
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   Look into Wave-particle duality.
It is a major part of Quantum Mechanics which answers your question.

A quick summary: light is not just a wave, not just a particle.
In some situations it behaves like a wave; in others it behaves like a particle.
  / Cort Ammon /
https://physics.stackexchange.com/questions/174446/is-a-single-photon-also-a-maxwellian-wave
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Yeah, i can understand this explanation:
Photon is like a cow, sometime it gives milk and  sometime - beef.
  / socratus /
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Sorry, i used wrong term : ''  infinite wavelength''
i needed to write that photon with speed  c   ''has no wavelength.'' 
So, photon travels with constant speed  c  without wavelength is a pure particle.
This pure particle travels in a straight line.
  Question: '' When does wavelength of photon appear ?''

  Another aspect of photon.
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One postulate of SRT says: the speed of quantum of light in a Vacuum
is a constant ( c= 299,792,458 km/ sec)  /  Michelson-Morley experiment  /
In this movement quantum of light  DOESN'T  have TIME
The time is stopped for him / it.
Question: ''When does time of photon appear?''
Another point.
The time for photon with speed  c  doesn't exist.
But this is possible only if his reference frame - vacuum -  also doesn't have time.
It means that the reference frame - VACUUM  is a TIMELESS  continuum.
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