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LIGHT-SPEED/LIGHT-TIME light moves at 300 000 kilometres a second
the speed of light is a constant and when used with planck's constant and gravity the speed of light can be used with confidence to explain and understand much of our experience of reality
example 1 the planet mars is sixty four million kilometres from the earth sixty four million kilometres divded by three hundred thousand kilometres equals two hundred and thirteen seconds at the speed of light two hundred and thirteen seconds is three and a half minutes travelling at the speed of light it would take three and a half minutes to go from the earth to mars example 2 the gathering place is 50 light years away travelling at one third of the speed of it would take 150 years to get there