As the Lord said, "Let there be light" there was light; this statement is found in Genesis 1:3, and as modern science teaches us that sound is energy, so we can be aware of what the writer of Hebrews 11:3 was bringing unto our awareness.

As this verse might a be a indirect poetic expansion of the final part of Roman 4:17 saying, calling those things that be not, as though they already were; speaking of God using faith to call the world and light into being.

This force called faith, in Romans 4:18, is shown to be found in father Abraham, compelling him, against all hope, he believed in hope and had a son from his wife in their old age....