SPACE AND TIME and SPACE=TIME. /by Socratus /

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a) Talking about space and time we all make common mistakes.

When we simple say 'space' or 'time' we deceive ourselves.

To be correct we must say ''there is only gravity - space'' and

'' there is only gravity - time'' because without gravity / masses

there isn't ''space'', there isn't '' time''.

We live on planet Earth and only gravity / masses created our space

and our time which are familiar us.

b) Space = Time. What it can mean?

There is only one theory that doesn't have gravity and it is Einstein's SRT.

SRT doesn't have similar ''our gravity -space'' and

doesn't have similar ''our gravity -time'' but SRT has some exotic ''spacetime''

that means that space equal time: Space = Time.

So, if I think of space as a distance then I must say:

1hour is equal 5 kilometers, 2hour =10 km, 3hour= 15km, . . . .etc.

On the Earth such arithmetic seems funny but in the spacetime

there is nothing to laugh at. Why?

Because in spacetime there is particle (photon) that can use this arithmetic.

Photon can travel with constant exotic speed 1sec=300000 km,

2sec = 600000km, 3sec = 900000km . . . . etc.

No other particle has such ability and it is fact - physical fact.

This fact Einstein took as one of postulate / law in his SRT.

Then it is possible to say that :

SRT is theory about behavior of quantum of light - photon - in the ''spacetime''.

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Best wishes.

Israel Sadovnik Socratus

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