A radio signal travels at the speed of light. So 299,792,458 m/s. It is 384,400 km to the moon. Can you work out how fast the signal from Nikon reached the moon?
So you choose to measure one way because you know that it is easy to measure the speed in two ways.
In my work I use radar. The basis of radar is that the signal bounces and the time it takes gives the distance to the object the signal bounced from.
I chose one way because it’s impossible to measure the one way speed of light. We don’t know that the speed of light is constant and doesn’t change upon return.
No advanced equipment is required to measure speed two ways. For example, with the help of the moon, radio amateurs can do it.
That you can easily measure two way, what is the difference to one way?
Do you think one way has a lower speed than two?
Comments
All of these photos are from Apollo 11. Taken moments apart.
https://archive.org/details/AS11-44-6551
https://archive.org/details/AS11-44-6558
https://archive.org/details/AS11-44-6563
In my work I use radar. The basis of radar is that the signal bounces and the time it takes gives the distance to the object the signal bounced from.
That you can easily measure two way, what is the difference to one way?
Do you think one way has a lower speed than two?