Question 15

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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Solution

As 1 light year is the distance covered by light in one year. So, if the star which is 10 light years away from the earth glows today, then it will be seen after 10 years.

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Light Year

Standard VIII Physics

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Question 15 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?

As 1 light year is the distance covered by light in one year. So, if the star which is 10 light years away from the earth glows today, then it will be seen after 10 years.

Question 15

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?