q6

A radar is able to detect the reflected waves from an enemy aeroplane after a time interval of 0.02ms.
if v= 3X10^8m/s. d=

1 Answers

337

Sayan Sinha ·2013-08-03 08:53:22

d= speed * time
Since, rays go and then come back, time interval= 0.02/2= 0.01 ms= 1.0 Ã— 10^-5 seconds....

So, d= 3 * 10^8 * 10^-5= 3*10 (8-5)= 3000 m or 3 km.

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