How will a light beam appear to another light beam.?

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SUMMARY

The discussion centers on the behavior of light beams in relation to each other, particularly when considering hypothetical mechanisms like tachyons for observation. It establishes that according to relativity, light beams do not age, remaining at a temporal interval of zero seconds. The conversation also touches on the principle that massless particles, such as photons, always travel at the speed of light, reinforcing established physics concepts.

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  • Basic principles of light behavior in physics
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Consider a light beam has a mechanism,say by some unknown virtual particles like tachyon or etc(like we use light beam to observe other things)...Or some mechanism to observe other light beam,then will the other beam of light move at speed of light for it too.?
And also taking relativity equations into consideration,light beam is aged 0 seconds right.?since its interval of 1 sec(of massive body) is infinitely long.Is this right..?
Is this also right by relativity equation the ones with zero mass or infinite mass always traverses with speed of light
 
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