Why Does Stationary Observer See Light Clock Traverse Longer Distance?

  • Context: Undergrad 
  • Thread starter Thread starter goodabouthood
  • Start date Start date
  • Tags Tags
    Clock Light Light clock
Click For Summary

Discussion Overview

The discussion centers around the perception of a light clock's operation from the perspective of a stationary observer versus an observer in motion. Participants explore the implications of relative motion on the observed path of light, questioning the nature of distance traversed by light in different frames of reference.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions why a stationary observer perceives the light clock's light to traverse a longer distance compared to an observer on the spaceship.
  • Another participant suggests using the analogy of a ball bouncing between the floor and ceiling to illustrate how motion appears differently to observers in different frames of reference.
  • A participant expresses uncertainty, indicating they can visualize both the light taking a longer path and appearing to move directly up and down, raising the question of whether a ball would actually take a longer path in reality.
  • One participant asserts that the differing perceptions of motion are tied to the concept of frames of reference, implying that both descriptions are valid within their respective contexts.
  • A later reply challenges the notion of an absolute 'reality', suggesting that perceptions are inherently relative.

Areas of Agreement / Disagreement

Participants exhibit uncertainty and differing interpretations regarding the nature of perceived motion and distance in different frames of reference. No consensus is reached on the underlying reasons for the observed differences.

Contextual Notes

Participants acknowledge the dependence on frames of reference and the relativity of observations, but do not resolve the implications of these concepts on the nature of light's path.

goodabouthood
Messages
127
Reaction score
0
Why does the stationary observer see the spaceship light clock traverse a longer distance?

How can you prove this? I don't understand why he sees the light take a longer path.

I understand it because you tell me this is so but I don't understand why it actually happens.
 
Physics news on Phys.org
Can you understand how a ball boncing between the floor and the ceiling would appear to the stationary observer to traverse a longer path than it would to an observer on the spaceship?
 
I can but that still doesn't really answer the question.

I can actually imagine it both ways. I can imagine looking at the moving observer and seeing his ball bounce directly up and down. I can also imagine it taking the longer path.

Would a ball actually take a longer path in reality?

I want to know why light takes a longer path.
 
Yes, the way you can imagine it both ways are two different ways you can describe the motion of the ball and the light which would be identical to two different Frames of Reference.
 
goodabouthood said:
Would a ball actually take a longer path in reality?
there is no 'reality' only 'relativity'
 

Similar threads

  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 34 ·
2
Replies
34
Views
4K
  • · Replies 14 ·
Replies
14
Views
2K
  • · Replies 45 ·
2
Replies
45
Views
6K
  • · Replies 25 ·
Replies
25
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 23 ·
Replies
23
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 12 ·
Replies
12
Views
2K