A wave sent out from a source is reflected back to the source in 1.0x10–³ seconds. If the velocity of the wave is 300000000ms–¹. What is the distance of the reflecting surface from the source.

Question

AZ · Answer

Distance = velocity * time

They told you the velocity is 300,000,000 ms^-1
This is actually the speed of light 3*10^8 m/s

And the time it took for it to travel the unknown distance at that speed was 1.0*10^-3 seconds

If you want to know the distance (in meters) then just multiply the two numbers together

What do you get?

Shallypeace · Answer

@az wrote:

Distance = velocity * time They told you the velocity is 300,000,000 ms^-1 This is actually the speed of light 3*10^8 m/s And the time it took for it to travel the unknown distance at that speed was 1.0*10^-3 seconds If you want to know the distance (in meters) then just multiply the two numbers together What do you get?

Thnx

AZ · Answer

No problem!