The equation y = 0.15 sin 5 x cos 300 t , describes a stationary wave. The

wavelength of the stationary wave is

[MP PMT 1995]

Zero

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1.256 metres

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2.512 metres

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0.628 metre

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Solution

The correct option is B
1.256 metres

On comparing the given equation with standard equation $\frac{2 π}{λ} = 5 \Rightarrow λ = \frac{6.28}{5} = 1.256 m$

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