Speed of Light & Bullet

[Ibix]

I measure the speed of the bullet Relative to Me to be 800mph . Is that correct ?

No, it is wrong. See post #57 for the correct calculation and the explanation of why simply adding low velocities almost works, and post #58 for a worked example.

The correct answer, given your 600mph and 200mph figures, is 799.9999999998mph. Your mistake amounts to around 0.3 microns per hour at these speeds, which is utterly negligible. But your error gets larger and larger as either velocity approaches $c$.

 

[PeroK]

After all , Einstein himself , in his famous Equation >>> E=Mc2 , uses the "speed of light Squared" !!!???
Now , that's WAY Faster than the speed of light "c" !!!!!!!!!!

If Einstein was wrong about relativity in the first place, then why would you trust $E = mc^2$? That makes no sense. My last thought on this is to refer you to Dunning and Kruger:

https://en.wikipedia.org/wiki/Dunning–Kruger_effect

 

[Nugatory]

So , throw all Clocks out the window into the " hyper plane of simultaneity" ???

No, of course not. Clocks work just fine.

However, your post #70 makes it clear that you haven’t been paying any attention to the answers you’re getting here - compare what you said in #70 with what we’ve already said in 23, 27, 29, 57, 58, 63. This is just wasting your time and ours so the thread is closed.

If you want to understand this part of how the world works, you should start with a proper textbook - many recommendations in this forum already. We can help you over the hard spots if you’re making a good faith effort to learn, but what what you’re doing in this thread isn’t that.