Quick Michelson and Moorley question

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In summary, the conversation discusses the concept of solving the velocity of a beam that splits and comes back towards a half silvered mirror perpendicular to the aether wind. The question is raised about whether the velocity should be solved vectorially, with the speed of light as the hypotenuse, or if the resultant velocity should be the hypotenuse as the wind and the light beam meet at a right angle. The suggestion is made to refer to other sources or post a diagram for clarification. The importance of understanding the definition of the speed of a beam in relation to the second postulate of Special Relativity is also emphasized.
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Precepts
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This may be hard to express without a diagram. For the beam that split left and came back towards the half silvered mirror perpendicular to the aether wind, shouldn't it be solved that way vectorially? My textbook has the speed of light (c) as the hypotenuse. Which has screwed me over in the way I think of it. Shouldn't the resultant velocity be the hypotenuse as the wind and the light beam meet at a right angle?
 
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Hi
Without seeing your diagram, I can't be sure. The best way to deal with your problem is to look at other sources of the same information - for instance this link. There is a triangle which appears to be along the same lines as the one you are querying.
This is a very popular problem to discuss so you are bound to find what you want by Googling.
Alternatively, you can try posting a diagram of your specific problem. Do whichever is easier for you.
 
  • #3
Precepts said:
This may be hard to express without a diagram. For the beam that split left and came back towards the half silvered mirror perpendicular to the aether wind, shouldn't it be solved that way vectorially? My textbook has the speed of light (c) as the hypotenuse. Which has screwed me over in the way I think of it. Shouldn't the resultant velocity be the hypotenuse as the wind and the light beam meet at a right angle?
I think before you can totally understand how a beam split itself, you should try to understand the definition of the speed of a beam (or a ray of light in the beam) if you can find one in any textbook.

If you cannot find one, try to define it by yourself. Your work will also help you to find out whether the speed of light in the second postulate of SR is referring to the speed of a photon in the ray or it is referring to the speed of the ray of light. One stone two birds.

I will like to discuss with you if your answer is different from mine.
 

FAQ: Quick Michelson and Moorley question

1. How did the Michelson and Morley experiment impact the scientific community?

The Michelson and Morley experiment had a profound impact on the scientific community as it provided evidence against the existence of the luminiferous aether, a hypothetical medium thought to carry light waves. This challenged the prevailing theory of the time, which was the aether theory, and ultimately led to the development of the theory of relativity by Albert Einstein.

2. What was the purpose of the Michelson and Morley experiment?

The purpose of the Michelson and Morley experiment was to measure the relative motion of the Earth through the hypothetical aether. They expected to find a difference in the speed of light depending on the direction of Earth's motion, but their results showed no such difference, leading to the conclusion that the aether did not exist.

3. How did the Michelson and Morley experiment work?

The experiment involved splitting a beam of light into two perpendicular beams, which were then reflected back to a central point where they interfered with each other. Any difference in the speed of light in the two directions would have caused a shift in the interference pattern. The apparatus was rotated to test for this shift, but no difference was found.

4. What were the implications of the Michelson and Morley experiment?

The implications of the experiment were significant as it challenged the prevailing theory of the aether and ultimately led to the development of the theory of relativity. It also paved the way for further experiments and theories, such as the famous E=mc^2 equation, which revolutionized our understanding of the universe.

5. Are there any modern applications of the Michelson and Morley experiment?

While the initial purpose of the experiment has been superseded by newer theories, the Michelson and Morley experiment is still relevant today in the study of the fundamental principles of physics. It is also used as a demonstration in many educational settings to illustrate the concept of relativity and the importance of experimental evidence in scientific discovery.

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