Question

Which of the following statements does not use the term light-year in an appropriate way? A) It's about 4 light-years from here to Alpha Centauri.B) It will take me light-years to complete this homework assignment.C) A light-year is about 10 trillion kilometers.D) It will take the Voyager spacecraft about 20,000 years to travel just 1 light-year. E) The Milky Way Galaxy is about 100,000 light-years in diameter.

Answer 1

Light year is the distance traveled by light in 1 year of time interval

so here we can say that the statement must have used the word light year as the distance

so we have

A) It's about 4 light-years from here to Alpha Century.

this shows the distance between two so it is correct

B) It will take me light-years to complete this homework assignment.

here it represent the light year as time so it is INCORRECT

C) A light-year is about 10 trillion kilometers.

This shows the distance so it is correct

D) It will take the Voyager spacecraft about 20,000 years to travel just 1 light-year.

It shows the distance so it is correct

E) The Milky Way Galaxy is about 100,000 light-years in diameter.

this is distance so it is also correct