I have what might be a silly question about time dilation caused by gravity. My understanding (very basic) of it thus far is as follows: 1. A clock (time) will tick slower when close to a gravitational source that a clock that's positioned farther away. 2. This affect has been measured in the real world using atomic clocks that are driven by atomic vibrations, which are constant. 3. My understanding (could be wrong) is that higher gravity is physically slowing down the atomic vibration inside the clock, therefore causing it to tick slower. My question is this: - Has this been measured using any other method than with atomic clocks which function on a physical movement (however small the scale) of atomic particles that can be physically slowed down by gravity? - How do we know that "time itself" is being affected and not simply the instrument that's being used to measure it - in this case, an atomic clock? After all, our conscienceness and perception of time is not affected by the atomic vibrations that affect atomic clocks. So, for example: in a scenario where two synchronized atomic clocks are placed in two different gravitational environments; and let's say for simplicity sake that clock #1 ticked 10x faster that clock #2 (let's say this is a MASSIVE difference in gravity). Would an observer next to clock #2 be able to see that the seconds seem to be ticking by much slower than what he/she is accostomed to? Moreover. If two observers wanted to conduct an experiment in this scenario - let's say both people could, say, type at a consistent and reliable 50 wpm (as measured on Earth's surface). Observer 1 sits next to clock 1 in the low gravity environment. The other is with clock 2 in the high gravity environment. They both sit and transcribe the same 3000 word article and agree to meet at some spot equidistant from eachother when they are finished. Would they show up at the meeting place simultaneously - only that stopwatch 2 reads 6:00 and stopwatch 1 reads 60:00? Or, put another way...If typist 1 and stopwatch 1 were on a spacestation in geosynchronous orbit over a SUPER HIGH GRAVITY planet (10:1 time dialation for the purposes of this question), and had a telescope powerful enough to look down and seen the fingers of typist 2. Would typist 1 see them as moving in super slow motion, or at normal speed? Everything I've read thus far seems to indicate that the answer would be that typist 1 would see typist 2 moving in super slow motion - but how do we actually KNOW? Again - I think my big hangup is that the only instrument that seems to have been used to measure this has physical inner workings that suseptible to changes in gravitational conditions. How do we know that human consciousness is subject to it in the same way?? PLEASE use very simple terms! I'm definitely not a physicist or a scientist, just a curious enthusiast - and a layperson. Thanks!