How far does light travel in 20 seconds?

1 Answer
Nam D.
Mar 27, 2018

#~~6,000,000=6*10^6 \ "km"#

Explanation:

In a vacuum, the speed of light is extremely close to #300,000 \ "km/s"#. So, in #20# seconds, light will travel,

#(300,000 \ "km")/(color(red)cancelcolor(black)"s")*20color(red)cancelcolor(black)"s"=6,000,000 \ "km"#

In scientific notation, this is written as #6*10^6 \ "km"#.

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