A standing wave is formed by the superposition of two waves travelling in opposite directions. The transverse displacement is given by y(x, t) = 0.5 sin ((5π)/4x) cos(200 π t). What is the speed of the travelling wave moving in the positive x direction ? (x and t are in meter and second, respectively.)

Oscillations and Waves: JEE Main 2017 Physics question

JEE Main 2017 · 9 Apr, Morning shift · Q8485

JEE Main 20179 Apr, Morning shiftPhysicsMediumOscillations and Waves185× since 2002

A standing wave is formed by the superposition of two waves travelling in opposite directions. The transverse displacement is given by y(x, t) = 0.5 sin

\left( {{{5\pi } \over 4}x} \right)\,

cos(200

\pi

t). What is the speed of the travelling wave moving in the positive x direction ? (x and t are in meter and second, respectively.)

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