NOT necessarily:You can use your ears too, provided that they are extremely good. If the sound of his footsteps is getting louder or its frequency is getting higher then the person is moving towards you else he is moving away from you.leroyjenkens said:You have to rely on your eyesight. If your sight isn't good enough, you won't be able to tell.
Or maybe you could see the direction shadows travel over the person. Back to front if they're walking away from you, and front to back if they're walking towards you.
Pythagorean said:For constant velocity, doppler shift only works if you get passed by them.
lisab said:Here's a related article.
http://www.theonion.com/articles/study-people-far-away-from-you-not-actually-smalle,33594/
This does not square with SR, where there are no preferred inertial frames. They only maintain their original size in their inertial frame. In your inertial frame, they are, in fact, shrinking down to tiny little people.“The data was irrefutable in demonstrating that when someone standing directly in front of you begins walking away, their body does not, as previously assumed, gradually shrink before eventually disappearing entirely,” said Dr. David Pinard, lead author of the study. “Rather, our findings indicate that they maintain their original size regardless of how tiny they may appear.”
zoobyshoe said:This does not square with SR, where there are no preferred inertial frames. They only maintain their original size in their inertial frame. In your inertial frame, they are, in fact, shrinking down to tiny little people.
Don't tell me they don't become tiny. I can see with my own eyes that they become tiny.Enigman said:Mmmm...don't think so, the people will just suffer lorntz. contr. only in direction of motion, becoming thin not tiny...
When you observe the person turn around and walk back toward you, the cat comes back to life. This can be repeated as many as nine times.Enigman said:Okay, not telling you that they become tiny! Any way, observing them will make the quantum state collapse.
Please don't observe people or the cat may die.
:rofl::rofl:zoobyshoe said:When you observe the person turn around and walk back toward you, the cat comes back to life. This can be repeated as many as nine times.
The direction of someone walking far away from you can be determined by observing the angles at which their body is moving. If their body is facing towards you, they are likely walking towards you. If their body is facing away from you, they are likely walking in the opposite direction.
Other factors that can affect the perception of someone's walking direction from a distance include the speed at which they are walking, the terrain they are walking on, and any obstructions or obstacles that may obstruct their path.
Yes, sound can be used to determine someone's walking direction from a distance. By listening to the sound of their footsteps, you can determine if they are getting closer or farther away from you. Additionally, the direction of the sound can also give you an idea of their walking direction.
Visual perception can be accurate in determining someone's walking direction from a distance, but it may not always be reliable. Factors such as lighting conditions, distance, and obstructions can affect the accuracy of visual perception. It is best to combine visual observation with other cues, such as sound, for a more accurate determination of someone's walking direction.
Yes, there are technologies and devices such as motion detectors, radar systems, and thermal imaging cameras that can aid in determining someone's walking direction from a distance. These technologies use different methods, such as detecting movement, emitting radio waves, or capturing heat signatures, to track and determine the direction of a person's movement.