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The second resonant length of an open air column is 48cm. Determine the first and third resonant lengths

  • physics -

    3•λ/4 =48
    λ=64 cm
    1• λ /4 =16 cm
    5• λ /4=80 cm

  • physics -

    Sorry. For open air column
    λ =L2 =48 cm
    L1 =λ/2 =48/2 =24 cm,
    L3 = 3• λ/2=72 cm.

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