Stellar distances and light travel time: Alpha Centauri to Earth. Alpha Centauri is the nearest star system after the Sun; estimate the time its light takes to reach Earth. Choose the correct option.
IIT JEE
Physics
Difficulty: Easy
Choose an option
-
AAbout 4.3 years
-
BAbout 8.3 minutes
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CAbout 1 year
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DAbout 4.3 minutes
Answer
Correct Answer: About 4.3 years
Explanation
Reasoning
- Alpha Centauri is ~4.3 light-years away; 1 light-year is the distance light travels in one year.
Final AnswerAbout 4.3 years