. A wave is represented by an equation y = c₁ sin (c₂.x+c₃.t). In which direction is the wave going? Assume that c₁, c₂ and c₃ are all positive.
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Answer ⇒ In Negative x-direction.
Explanation ⇒
Given,
Equation of the wave is,
y = c₁ Sin (c₂.x+c₃.t)
Taking c₂common inside the sine function, we will get,
y = c₁Sin[c₂(x + tc₃/c₂)]
Let c₂/c₃ = c (constant.)
∴ y = c₁Sin[c₂(c + t/c)]
Now, we can write this function as,
y = f(x + t/c)
We know Sine function is an increasing function, hence the wave will travel in negative x direction.
Hope it helps.
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