The speed of sound in air at sea-level is 340ms-1 while that of light is 300 000kms-1. How far (to the nearest meter) from the center of a thunderstorm is an observer who hears a thunder 2s after a lightening flash?
-
A.
170ms-1 -
B.
340ms-1 -
C.
600ms-1 -
D.
680ms-1
Correct Answer: Option D
Explanation
Distance = 340 x 2 = 680ms-1