Time delation or clock malfunction!! Using an example of light clock, it shows light takes more time now to reflect between reflectors due to elongated path as to moving observer, so 1 sec gets elongated. But this could also mean that the clock malfunctions as compared to observer. I mean one second is one second, how it can change???? light now takes more time to complete its one cycle doesn't mean 1 sec gets elongated. It's just the clock which now takes more than one second to show one second increment to the observer. That means clock malfunctions for the moving observer but it can't elongate 1 sec. Why will biological processes get slower? So why will aging occur?