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  5. "Một năm ánh sáng dài bao nhi…

"Một năm ánh sáng dài bao nhiêu?"

Translation:How long is a light-year?

January 15, 2017

5 Comments


https://www.duolingo.com/profile/dongsang

Shouldnt this be "how far is a light year"? light year is a meausure of distance, not time.


https://www.duolingo.com/profile/okorz001

How long is a meter?


https://www.duolingo.com/profile/ethernal4

I think you're mistaken. The question actually asks for how long it is distance wise. For instance, can you say exactly what distance constitutes an AU or a parsec? Most people can't.


https://www.duolingo.com/profile/Blaine535549

It's far more common in my region to say "how big" or "how far" than "how long" with distances. ("My region" is Edmonton, Alberta, Canada, where I earned two physics degrees, so I've heard this exact question a lot.)

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