Incorrect.
It's easy to teach and learn relative time.
Paper and pencil.
Draw a line down, say, three inches.
At a constant speed, follow that line up, down, up down.
After you have a constant rhythm, pull the paper from the left at a constant speed.
Your line becomes a diagonal to the right and it takes you longer to get it as low as the original vertical line.
And because it takes longer the line is longer, like the hypotenuse on a right triangle.
More time = longer line, and vice versa.
Imagine that you are a gigantic ethereal consciousness in space and you have a clock. It's a long tube with mirrors at the top and bottom. It's so long that it takes the pulse of light trapped inside to take one second going from end to end.
They're stylish clocks and all of you ethereal beings have one and you can all see that each others light clocks are correct.
I take myself and light clock far away.
When you least expect it, I go by you from right to left, at a constant speed.
I am watching my light clock while I go, and it's keeping perfect time - the speed of light never changes.
But you are also watching my light clock and to you it's obvious - while I see the light pulse going straight up and down - you see the light pulse in my clock trace a diagonal as I go by.
I measure the line going from top to bottom and I've got one second.
As you watch, you can see that my line is longer, being a diagonal, and therefore, you're sure that my clock must be running slow - it takes too long for the light pulse to reach the bottom of my clock.
On these scales of speed and space we must conclude that because the speed of light is constant, you and I experience a different version of what one second of time is, relative to one another.
Keep this exercise up until one of us passes by at light speed.
The light pulse becomes a left-right line.
It never reaches the bottom of the tube, in fact, from your point of view it stays at one point inside my tube - so there is no passage of time - and for light itself (not things), that's exactly right - there is no time.
We say that light takes just over four years to reach us from the nearest star.
From our point of view, that's true.
From the light's point of view, it didn't take any time at all - it simply eternally existed instantaneously from that star to our eyes.
Only for light is past, present, and future non-existent and everything is simultaneous.
It has to be. Because the speed of light is constant.
And it's constant because it's not a speed - it's a conversion factor.
1 pint = 16 ounces
If I want to convert 2 pints into ounces, I take the above equation and make a conversion factor -
2 pints * ( 16 ounces / pint) = 32 ounces.
Light doesn't travel 186,000 miles/second - light is timeless.
186,000 miles/second is the conversion factor to convert time into space and space into time.
It's not a party trick and you can't vote on it.
186,000 miles per second isn't just a good idea - it's the law.
Einstein has been proven right. I just now did it again, and if you followed this in your mind's eye, then you just did too.
he also played pro baseball 
