Question

The distance of $1.8\times {10}^{7}km$ is equivalent to one light-year.

• A. True
• B. False

Answer 1

The correct option is B False

1. One light-year: It is the distance traveled by the light in one year.
2. As we know in one second light travels 300000 km.
3. 
   $$\begin{gathered} 1lightyear=1year\times speedoflightinonesec \\ 1lightyear=(365\times 24\times 60\times 60sec)\times (300000km{s}^{-1}) \\ 1lightyear=9.46\times {10}^{12}km \end{gathered}$$

Hence, the given statement is false.