Dear Saibandhu,
Sir narrated previously for this question, when asked by some devotee, saying Master has explained him in in-numerable ways scientifically, but Sir could not understand or remember them well. He mentioned master told him that wall is not as it is appearing and is nothing but void and he explained nature of all as electrons etc.. but he did not understand and finally master have sent him to Mahatmas..
When it is possible for you, I may suggest you to clarify (such of) your questions, directly from Sir, who stays at Golagamudi.
Regards,
Sai.