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brianhurren
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by the time light from a distant star reaches us, let's say from Canopus, does the light become coherent?
and if it is coherent, can you make an astrohologram?
and if it is coherent, can you make an astrohologram?
Saying that light rays are parallel does not mean they are coherent.Varadha said:If two observers are near, the light rays from such a distance source may be considered as coherent because, the angle between the light rays is too small and negligible. Theoretically, this assumption is valid
HallsofIvy said:Saying that light rays are parallel does not mean they are coherent.
Varadha said:Oh. Sorry. I thought any parallel rays in phase are coherent
Distant starlite refers to the light emitted by stars that are located far away from our planet, often outside of our own galaxy. This light travels through space and reaches us on Earth, allowing us to observe and study distant stars.
Coherence refers to the property of light waves where they maintain a constant phase relationship with each other. In other words, the peaks and troughs of the light waves align with each other, resulting in a stable and predictable pattern. In the context of distant starlite, coherence is important because it allows us to accurately analyze and interpret the information carried by the light.
There are several methods that scientists use to determine the coherence of distant starlite. One common technique is to measure the interference patterns of the light waves, where coherent waves will produce a distinct and regular pattern. Another method involves analyzing the polarization of the light, which can provide information about the coherence of the source.
The coherence of distant starlite is important because it can provide valuable information about the source of the light. By studying the coherence, scientists can learn about the physical properties and behavior of the star, such as its temperature, composition, and movement. Coherence also allows for more accurate and detailed observations of distant stars, leading to a better understanding of the universe.
Yes, distant starlite can lose its coherence over long distances due to various factors such as interactions with interstellar gases and dust, gravitational lensing, and the expansion of the universe. However, for most practical purposes, the coherence of distant starlite remains intact and can be studied by scientists.