Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Question on Michelson Morley experiment

  • 03-10-2011 7:28pm
    #1
    Registered Users, Registered Users 2 Posts: 2,553 ✭✭✭


    Just wondering if anyone knows if there is any truth to the claim below?
    [SIZE=+1] the velocity of the mirror must be taken into account to calculate the angle of reflection of light. Using the Huygens principle, we see that the angle of reflection of light on a moving mirror is a function of the velocity of the mirror. This has been ignored in the Michelson-Morley calculation. Also, due to the transverse direction of the moving frame, light does not enter in the instrument at 90 degrees as assumed in the Michelson-Morley experiment[/SIZE]
    Newton Physics


Comments

  • Registered Users, Registered Users 2 Posts: 3,457 ✭✭✭Morbert


    roosh wrote: »
    Just wondering if anyone knows if there is any truth to the claim below?


    Newton Physics

    He does not apply the correction terms properly. In equation (1) he derives the correction term (1-v^2/c^2)^-1 for a mirror moving parallel to the beam of light (call it c1 or "correction term 1"). In equation (4) he derives the correction term for light bouncing off a mirror moving transverse to the beam of light (1-v^2/c^2)^-1/2. He correctly points out that the latter correction is about half of the former correction (c2 = c1/2). But where he goes wrong is he derives the latter correction a second time for no reason. I.e. He gets c2 = c1/2 + c1/2 = c1. His moving mirror calculation simply explains why the light moves in a triangular trajectory, rather than just straight up and down. It is already dealt with in equation (4) and does not need to be dealt with a second time.

    It should also be pointed out that the absence of an aether and lorentz invariance has been explored in more accurate and sophisticated experiments. Two examples are below.

    http://arxiv.org/pdf/1002.1284
    http://arxiv.org/pdf/gr-qc/0504109v1

    The absence of an aether has also been incorporated into particle physics with accurate predictions up to one part in a trillion.


  • Registered Users, Registered Users 2 Posts: 2,553 ✭✭✭roosh


    Morbert wrote: »
    He does not apply the correction terms properly. In equation (1) he derives the correction term (1-v^2/c^2)^-1 for a mirror moving parallel to the beam of light (call it c1 or "correction term 1"). In equation (4) he derives the correction term for light bouncing off a mirror moving transverse to the beam of light (1-v^2/c^2)^-1/2. He correctly points out that the latter correction is about half of the former correction (c2 = c1/2). But where he goes wrong is he derives the latter correction a second time for no reason. I.e. He gets c2 = c1/2 + c1/2 = c1. His moving mirror calculation simply explains why the light moves in a triangular trajectory, rather than just straight up and down. It is already dealt with in equation (4) and does not need to be dealt with a second time.

    It should also be pointed out that the absence of an aether and lorentz invariance has been explored in more accurate and sophisticated experiments. Two examples are below.

    http://arxiv.org/pdf/1002.1284
    http://arxiv.org/pdf/gr-qc/0504109v1

    The absence of an aether has also been incorporated into particle physics with accurate predictions up to one part in a trillion.

    cheers


  • Registered Users, Registered Users 2 Posts: 7 Jack_Bauer


    Hi guys, i'm looking for an essay for michelson morley experiment overview and results. It's for college night course and under pressure with so much more, any help on this would be greatly appreciated.


Advertisement