In a resonance column, two successive resonances are obtained at depths $ 30 \mathrm{~cm} $ and $ 50 \mathrm{~cm} $, respectively. The next resonance will be obtained at a depth,

Question

In a resonance column, two successive resonances are obtained at depths $ 30 \mathrm{~cm} $ and $ 50 \mathrm{~cm} $, respectively. The next resonance will be obtained at a depth,, $ 60 \mathrm{~cm} $, $ 80 \mathrm{~cm} $, $ 70 \mathrm{~cm} $, $ 90 \mathrm{~cm} $

MARKS App · Accepted Answer

In a resonance column, difference in depth of ;two successive resonances = distance between two consecutive nodes = λ 2 λ 2 = 50 - 30 cm = 20 cm Next resonance will be obtained at 50 + λ 2 = 70 cm .

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