Is darkness the absence of light, or is light the absence of darkness?
What is the difference between absence of light and presence of darkness?
What is the absence of darkness? Why is the absence of light black? What is the difference between invisible and non-visible? Why can't we see things in darkness? Why is light not matter? Could visible lights or photons have a shadow? Is light matter or non-matter? Can light exist without a source? How can we see black holes if light does not escape? Doesn't this mean that it does not reflect light? If absence and presence need to exist as a discrepancy, is the discrepancy relative to the universe or its source? What is a black light? What is the difference between direct and indirect sunlight? Is dark matter invisible? Is dark matter visible? Light needs a medium to travel, so how does sunlight come from space? What exactly is dark matter? How is it different from normal matter? How can we see black holes if light does not escape? Doesn't this mean that the hole does not reflect light? What is the difference between emissivity and reflectivity? What is the relationship between electromagnetism and light? Can we see light? Can light still exist without the source? What is the relationship between an electromagnetic field and light? What is visible light and how can it be used? What is the relationship between sound and light? Why can't we see the light? What exactly is dark matter, and how is it different from normal matter? How do white and black color come out when none of them exists in the visible light spectrum? Is a UV light the same as a black light? What is the difference between headlight and fog light? What is dark?