Which of the following statements is NOT correct?

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Accepted Answer

1. Definition: A light-year is the distance travelled by light in one year (in vacuum); therefore it is a unit of distance, not time.

2. Value: $1\ 	ext{ly}\approx 9.46	imes10^{15}\ 	ext{m}$ — this confirms statements (1) and (2) are correct.

3. Angstrom: $1\ 	ext{\AA}=10^{-10}\ 	ext{m}$ — statement (4) is correct.

4. Conclusion: Statement (3) (Light year is the unit of time) is NOT correct.

FINAL_ANSWER: c

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