Does Expanding Space Affect Light Frequency?

[Energyloop]

I thought I would put this post up for some general feedback it's a couple of thoughts I had, one day.

I have started to read Richard Feynman's book 'QED' I have a current fascination at the moment with light and this appeared to be a good book to gather a clearer understanding about how it works, I’m only on page 45 and these observations are unrelated to what I have read already.

When I think about light a couple of thoughts spring to mind, one is how does the frequency of light change in expanding space, as expansion occurs does the expansion of space cause light to stretch into lower frequencies? This could be quite simple question to answer, although when we talk about space we have to talk about time, and light is a constant, so I think it could become a little complicated, I have not had time to sit down and think about this yet.

The other thought is regarding the way we get information from light, the only way, and if I’m wrong please say, is to view its source or view reflected light, if light is viewed side on through a vacuum, no information can be obtained, so if this is true, could it be possible that there are sources of energy (electromagnetic, or not maybe), which are propagated around the universe, but we are unable to see its source, as they might be emanating from other dimensions for example.

 

[eljose79]

I find your thoughts on light and its properties very interesting. Light is a fundamental part of our universe and understanding its behavior is crucial in many areas of science. I would be happy to provide some feedback on your thoughts.

Firstly, your question about the frequency of light changing in expanding space is a valid one. It is known that the expansion of space does affect the wavelength of light, causing it to stretch into lower frequencies. This is known as cosmological redshift and is a result of the expansion of the universe. This phenomenon is important in understanding the evolution of the universe and is used in cosmology to measure the distances of objects in space.

Regarding your second thought about obtaining information from light, you are correct that we can only gather information from viewing its source or from reflected light. However, there are other ways to gather information from light, such as using spectroscopy to analyze the different wavelengths of light emitted by an object. In addition, there are also other forms of energy, such as gravitational waves, that can provide information about objects in space.

As for your idea about energy being propagated from other dimensions, this is a topic that is still being explored and studied in theoretical physics. While there is currently no concrete evidence for the existence of other dimensions, some theories suggest that there may be hidden dimensions that we are not able to perceive. Further research and experiments are needed to fully understand this concept.

Overall, your thoughts show a curiosity and interest in the properties of light, which is important in the scientific community. I would encourage you to continue reading and exploring this topic, as there is still much to discover and understand about light and its role in the universe.