Realize parallel light rays meet at infinity. When you move a light source furth
ID: 2075631 • Letter: R
Question
Realize parallel light rays meet at infinity. When you move a light source further away, light rays emanating from it and hitting your eye will be more and more parallel with each other. Since an astronomical object is nearly infinitely far away, its light rays have no measurable difference from being perfectly parallel to one another. Parallel light rays come from the same one star. Looking at the results of this, you can see in the diagram that light from a single star can therefore enter every part of the front of a telescope. It is easy to mistakenly belief that those light rays come from multiple different stars on the sky, but they all come from the same star. Light from other stars would be coming in at slightly different angles. After all, as you go outdoors and look at lots of stars, you change the tilt of your head to point different directions for each star you look at. Light that come in parallel into the front of a telescope are likely to be coming from what? Possible answers are one star, many stars, a large broad object like the Moon, or a cloud in the sky.Explanation / Answer
light rays that come in parallel into the front of a teliscope are likely to be coming from one star. As the star is at infinity (assumed) so the rays coming from it are parallel.
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