25. K Calculus (#1/6): The twin paradox that can be understood by common sense
Let's take a look at K Calculus from now on six times. K calculus was Hermann Bondi's first proposed relativistic calculation method. The important thing is that we start using basic common sense . I f we do this, it will therefore be very easy. This method starts using simple common sense, and can derive the time dilation, velocity-addition formula , relativistic Doppler effect, and the Lorentz transformation itself. And during 5th and 6th time, I will point out the error of the length contraction and prove the length expansion through K Calculus. I need a few posts to do that. After explaining that k calculus is a relativistically correct method, we will talk about 'the principle of invariant light speed and length'. I will describe it in the manner described by Bondi. I will let you know and explain in advance what the different is between Bondi's method and my own. This method only deals with moving in one direction. This is the only dra