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Consider two observers. One on the ground and another on a moving train. Both of them have clocks.
Choose the correct statements.
  • a)
    The ground clock runs faster than the train clock. 
  • b)
    The ground observer finds the train clock run slow. 
  • c)
    The train clock runs slow because it is the clock in motion. 
  • d)
    The train observer finds the ground clock run slow.
Correct answer is option 'B,D'. Can you explain this answer?
Verified Answer
Consider two observers. One on the ground and another on a moving trai...
From the rest frame of the ground observer the clock in the train is moving. The train clock runs slow from the point of view of the ground observer. From the rest frame of the train observer, the ground clock appears to be moving
∴ From the reference frame of the train, the ground clock runs slow
The correct answers are: The ground observer finds the train clock run slow., The train observer finds the ground clock run slow.
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Most Upvoted Answer
Consider two observers. One on the ground and another on a moving trai...
Explanation:

Introduction:
In the scenario described, there are two observers: one on the ground and another on a moving train. Both observers have clocks. When considering the concept of time dilation, we need to understand that the perception of time can vary depending on the relative motion between two observers.

Time Dilation:
Time dilation is a phenomenon predicted by Einstein's theory of relativity. It states that time can appear to run at different rates for observers in relative motion. The faster an object moves, the slower time appears to pass for that object when observed by a stationary observer.

Ground Observer Perspective:
The ground observer is stationary, and from their perspective, they see the train moving. According to time dilation, the clock on the moving train will appear to run slower compared to the ground clock. This is because the train is in motion relative to the ground observer, and time dilation causes clocks in motion to run slower than clocks at rest.

Train Observer Perspective:
The train observer is in a moving frame of reference, and they perceive themselves as being at rest. From their perspective, the clock on the ground appears to run slower compared to their own clock. This is because they are in motion relative to the ground, and according to time dilation, clocks in motion appear to run slower.

Conclusion:
In summary, the correct statements are:

B) The ground observer finds the train clock run slow: From the ground observer's perspective, the clock on the train appears to run slower due to time dilation.

D) The train observer finds the ground clock run slow: From the train observer's perspective, the clock on the ground appears to run slower due to time dilation.

These statements are consistent with the concept of time dilation, which explains the perceived differences in the passage of time between observers in relative motion.
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Consider two observers. One on the ground and another on a moving train. Both of them have clocks.Choose the correct statements.a)The ground clock runs faster than the train clock.b)The ground observer finds the train clock run slow.c)The train clock runs slow because it is the clock in motion.d)The train observer finds the ground clock run slow.Correct answer is option 'B,D'. Can you explain this answer? for Physics 2026 is part of Physics preparation. The Question and answers have been prepared according to the Physics exam syllabus. Information about Consider two observers. One on the ground and another on a moving train. Both of them have clocks.Choose the correct statements.a)The ground clock runs faster than the train clock.b)The ground observer finds the train clock run slow.c)The train clock runs slow because it is the clock in motion.d)The train observer finds the ground clock run slow.Correct answer is option 'B,D'. Can you explain this answer? covers all topics & solutions for Physics 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider two observers. One on the ground and another on a moving train. Both of them have clocks.Choose the correct statements.a)The ground clock runs faster than the train clock.b)The ground observer finds the train clock run slow.c)The train clock runs slow because it is the clock in motion.d)The train observer finds the ground clock run slow.Correct answer is option 'B,D'. Can you explain this answer?.
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