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A star is ten light years away from the ...

A star is ten light years away from the earth. Suppose it brightens up suddenly today. After how much time shall we see this change?

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To solve the problem of how long it will take for us to see the change in brightness of a star that is ten light years away from Earth, we can follow these steps: ### Step 1: Understand the Concept of Light Year A light year is the distance that light travels in one year. Therefore, if a star is ten light years away, it means that light from that star takes ten years to reach Earth. ### Step 2: Determine the Distance The distance to the star is given as 10 light years. This means that light emitted from the star today will take 10 years to reach us. ...
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