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    ApoorvGoel's Avatar
    ApoorvGoel Posts: 36, Reputation: 1
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    #1

    Apr 21, 2011, 02:03 PM
    Physics
    Q. Length of a string tied to 2 rigid bodies is 40cm. Max length(wavelength in cm) o a stationary ave produced on it, is
    a.)20
    b.)80
    c.)40
    d.)120

    Please give your ans with correct explanations
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Apr 22, 2011, 09:03 AM

    The largest wavelength you can have is when you have two nodes at the two extremities.

    The distance between the two nodes is 40 cm.

    Can you find the wavelength?
    ApoorvGoel's Avatar
    ApoorvGoel Posts: 36, Reputation: 1
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    #3

    Apr 22, 2011, 03:32 PM
    Comment on Unknown008's post
    Please tell me the formula to calculate wavelength
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #4

    Apr 23, 2011, 08:07 AM

    There is no formula for that, unfortunately. It's all about thinking!

    See this article, more precisely, the first image you see in the article, first line.

    Fundamental frequency - Wikipedia, the free encyclopedia

    Do you see the position of the string when it is made to vibrate and a stationary wave is produced. The first one is where the max length is obtained.

    I assume you know the shape of a wave, and from this, you should be able to 'see' how much of the wave is present on the stationary wave and from there, deduce the wavelength.
    ApoorvGoel's Avatar
    ApoorvGoel Posts: 36, Reputation: 1
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    #5

    Apr 26, 2011, 01:45 PM
    Comment on Unknown008's post
    Thanks a lot for your answer
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #6

    Apr 27, 2011, 09:31 AM

    And... your answer was? :)
    ApoorvGoel's Avatar
    ApoorvGoel Posts: 36, Reputation: 1
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    #7

    Apr 27, 2011, 02:44 PM
    Comment on Unknown008's post
    80
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #8

    Apr 28, 2011, 08:17 AM

    Good! :)
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