Thank you for your question!
Please stop believing in what you can see. Usually that is deceiving. 🙂
Paramdham or the “soul world,” could be defined as a dimension by using simple words; however that does not mean anything nor does add anything “good” to your knowledge other that useless information. When you say “Parandham” is a dimension; you haven’t said anything but merely hiding a lack of knowledge behind another word. “Parandham” is an experience. You may ask a Sanyassi according to Sakar Murlis; who has “experienced” that. If he tells you, it is “this and that,” you can share that “information” with someone else; and that becomes just repetition of words of something which cannot be readily experienced by “normal” people trapped in the physical world… that is Science. 🙂
There will never be a “material” gadget to know something “non-material.”
For scientists, the “4th dimension” is what used to be known as “time,” and now; known as “time-space.” However, scientists do not know that time is paradoxical. When trapped in the physical realm there is time; even though for the “soul” time does not exist. According to your consciousness, so is your experience and your perception of reality.
One more thing; Gyan to be knowledge is meant to be experiential. Otherwise, Gyan without experience is just encyclopedic information.