AIEEE 2002 | Waves Question 145 | Physics

A wave $$y=a$$ $$\sin \left( {\omega t - kx} \right)$$ on a string meets with another wave producing a node at $$x=0.$$ Then the equation of the unknown wave is

$$y = a\,\sin \,\left( {\omega t + kx} \right)$$

$$y = - a\,\sin \,\left( {\omega t + kx} \right)$$

$$y = a\,\sin \,\left( {\omega t - kx} \right)$$

$$y = - a\,\sin \,\left( {\omega t - kx} \right)$$

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