Stationary wave ?

The answer is B but how to solve it?

Could anyone give my some tips to solve this type of question?....

Thank you

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1 Answer

  • rotchm
    Lv 7
    4 months ago
    Favourite answer

    The distance between two nodes is a half wavelength (a "bump"). 

    Your x is 3 bumps, or, 1.5 wavelengths = 1.5λ.

    But c = λf --> λ = c/f.

    Thus x = 1.5λ = 1.5 * c/f.

    You are given c & f. Compute. Done!

    Don't forget to vote BA. 

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