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How old is a photon that traveled 13 billion light years?
After looking at the Deep Space Field image taken by Hubble, I was wondering how old the photons were that produced that picture.
3 Answers
- MorningfoxLv 71 decade agoFavorite Answer
In one sense, they are 13 billion years old. But photons don't age. A photon that has just been created is just like a photon that's been traveling for 13 billion years.
- ?Lv 51 decade ago
In our point of view, a photon that traveled 13 billion light years is 13 billion years. However, a photon can't age. So...
- Anonymous1 decade ago
In our frame of reference, 13 billion years. In the photons' own frame of reference, they haven't "aged" at all.
