The arcs of light observed around a galaxy are typically caused by gravitational lensing, a phenomenon predicted by Einstein's theory of general relativity. When a massive object, such as a galaxy or cluster of galaxies, lies between a distant light source and an observer, its strong gravitational field can bend the light from the source. As a result, multiple images of the background object may be seen, often appearing as arcs or rings. This effect not only magnifies the light but also distorts the shapes of distant galaxies, allowing scientists to study their properties and understand the distribution of dark matter in the universe.
A scientist, using a telescope, sees arcs of light around a galaxy. In 3–5 sentences, explain the cause of the arcs of light
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