Introduction

The range of frequencies that the human eye can perceive is limited to 430-770 Thz, while our ears can only detect sounds between 20 Hz and 20 kHz. These ranges represent only a small fraction of the entire spectrum of sound and light frequencies. As a result, there is a vast amount of activity happening around us that we are unable to see or hear.

Are you familiar with the notion of a parallel world or the concept of a multiverse? Can you imagine what it would be like to journey to another world and reunite with your beloved person whom you lost?