There are two kinds of matter in science: ordinary matter, which we can see, which is also known as baryonic matter. And dark matter, which we cannot see, and we have no clue what it’s made of.
They both produce gravitational force, bend light rays and are attracted to each other.
Baryonic matter emits electromagnetic radiation, and dark matter does not. The radiation passes right through the dark matter with no effect. Dark matter also passes right through baryonic matter.
The wavelength of the rays emitted by baryonic matter depend on the temperature of atoms.
The electromagnetic spectrum shows us light, what is visible and invisible.
Our eyes detect only a short segment of radiation, which we call “light.”
Therefore, these verses indicate God declared both kinds of matter.
“And God said, Let there be light: and there was light.
And God saw the light, that it was good: and God divided the light from the darkness.#the light from…: Heb. between the light and between the darkness
And God called the light Day, and the darkness he called Night. And the evening and the morning were the first day.”
Therefore, this indicates that when the Bible says “Let there be light,” the sun was not created at that point. It means that God created the types of particles that emit light at the right temperature.
The word “divided” in these verses may indicate a separation of different kinds of particles. Alternating light and darkness separated on a time axis would be better described by the word “alternated”. The particles were separated on a spatial axis not a time axis, and there was no time keeping involved.