# physics

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A standing wave has a wavenumber 200 rad/m. What is the distance between two adjacent nodes?

• physics -

1/200 = 0.005 meters / rad
pi rad / node x 0.005 meters / rad = 0.0157 m / node

• physics -

k=2π/λ
=> λ=2π/k=2π/200 =π/100=0.0314 m
x= λ/2=0.0314/2=0.0157 m

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