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What is true about the vector k?

What is true about the vector k?

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In classical physics, one type of wave, called a plane wave, is represented mathematically as: V(r, t) = Ae(kr-wt). What is true about the vector k? I. It's magnitude is directly proportional to wavelength. II. It points in the direction of the wave propagation. II. It's magnitude is inversely proportional to the speed of wave. O I and III. I. O II. and III. O II.
Transcribed Image Text:In classical physics, one type of wave, called a plane wave, is represented mathematically as: V(r, t) = Ae(kr-wt). What is true about the vector k? I. It's magnitude is directly proportional to wavelength. II. It points in the direction of the wave propagation. II. It's magnitude is inversely proportional to the speed of wave. O I and III. I. O II. and III. O II.
Expert Solution
Step 1

In the wave equation ψ(r,t)= Aei(k.r-ωt), K is known as wave vector.

A wave vector is a vector which points in the direction in which the wave propagates.

 

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