What Borg said is pretty much all there is to it. Light travels at the speed c, so it can only move through the universe at that speed. Keep in mind that what we see is simply light reflected off objects and traveling through spacetime at speed c to us.Lewis123 said:I am having a large amount of trouble conceptualising the idea of light taking time to reach places, how we are seeing into the past when we look further out and the idea of the known universe.
If someone could please elaborate on those points it would be much appreciated.
Light is a form of electromagnetic radiation that is visible to the human eye. It is conceptualized as a wave-particle duality, meaning it can behave as both a wave and a particle. This concept is known as wave-particle duality and is a fundamental principle in quantum mechanics.
Light travels through the universe at a constant speed of approximately 299,792,458 meters per second. This is known as the speed of light. It can travel through a vacuum, such as outer space, as well as through transparent materials, such as air or water.
Light can interact with matter in three ways: absorption, reflection, and transmission. Absorption occurs when light is absorbed by matter, causing it to convert to other forms of energy. Reflection occurs when light is bounced off a surface, and transmission occurs when light passes through a material without being absorbed or reflected.
Scientists use a variety of tools and techniques to study light and the known universe. These include telescopes, spectroscopy, and computer simulations. These tools allow scientists to observe and analyze the properties of light as well as the objects and structures in the universe.
There are several theories about the origin of light and the known universe, including the Big Bang theory, the Steady State theory, and the Inflationary theory. These theories attempt to explain the creation and evolution of the universe, including the role of light in its formation and expansion.