An astronomy student is studying the sun. While monitoring her equipment, she observes a solar flare. She then observes the reflection of the solar flare off of a passing satellite and with her equipment she is able to determine that the reflected light arrives from the satellite in t = 5.79 ms.

Question

An astronomy student is studying the sun. While monitoring her equipment, she observes a solar flare. She then observes the reflection of the solar flare off of a passing satellite and with her equipment she is able to determine that the reflected light arrives from the satellite in t = 5.79 ms. 
(a)  There are approximately 1609 meters per mile. If the sun is 93 million miles away, how far is the sun in kilometers to two significant figures.

kyle · Accepted Answer

5.09 x 108

bobpursley · Answer

So the path was 5.79ms further? so the distance half that? d=velocity light*time