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3 answers

Frequency is a property of a wave that is constant. Wherever it passes, the frequency stays the same.

When a wave passes from one medium to another, the speed changes. From the equation Velocity = frequency * wavelength, you can see that the velocity of a wave is directly proportional to its wavelength. So if your velocity drops, your wavelength also becomes smaller. The reverse process is also true., so if the velocity increases, the wavelength likewise goes up.

2006-07-21 06:03:57 · answer #1 · answered by dennis_d_wurm 4 · 1 0

Mainly because of the condition of continuity across the boundary. This will require the oscillation to maintain the same frequency. Since the speed does change, however, the wavelength has to change to give that same frequency.

2006-07-21 05:59:13 · answer #2 · answered by mathematician 7 · 0 0

Simple Siram; the speed of the wave changes with wavelength, keeping the freq. constant.

velocity/wavelength = constant = freq.

2006-07-21 05:06:32 · answer #3 · answered by Anonymous · 0 0

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