# What if a normal digital clock used to measure time in twin paradox?

Last night I was watching a youtube video about twin paradox. It still continues to baffle me :).

In that video, the speaker conceptualizes a clock that measures time by reflections of light. If we consider speed of light as reference to our time measurement, I guess it is natural to expect that our time measurements will be warped if we are traveling at speeds comparable to that of light.

I was wondering, what if if we measure time with something else as reference? Say, a digital clock, assuming it works under such extreme speed/acceleration... So, my questions:

1. Would our time measurements then be still warped?
2. I think, even if the measured times indeed gets warped, is it not just the perceived time for the traveling twin? Logically, the twins have lived for the same amount of time (as measured from a digital clock on earth) and should have grown/aged similar. Why would the twin who stayed back on earth be aged more?

I might be totally wrong, but I would appreciate if somebody helps me understand where I went wrong.

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This is no more puzzling than the sum of the two legs of a triangle being longer than the third. The travelling twin makes a triangle is space time, going out then coming back, and the time along the two legs adds to less than the time along the third leg. – Ron Maimon Jul 13 '12 at 20:15