Abstract The article proves that the generally accepted version of STR, which states that imaginary numbers are physically unreal, is incorrect. Experimental evidence is given of the general scientific principle of the physical reality of imaginary num-bers, with the use of which a corrected version of the SRT was created. She argues that in addition to our visible universe, there are many other mutually invisible uni-verses in nature. And they form the actually physically existing after-life invisible world, predicted by all religions.