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So at school the told us that: V= f x λ

In refraction we were told that direction,speed and wavelength changes when a wave crosses different mediums, and on another occasion that frequency is the number of waves that pass at a given point per second

so if the wavelength and speed changes, doesn’t that cause a decrease or increase of the number of waves passing the point per second aka frequency? Please clear up the confusion for me :)

Qmechanic
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Yaraa
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  • Possible duplicates: https://physics.stackexchange.com/q/22385/2451 and links therein. – Qmechanic Sep 23 '22 at 09:05
  • It is just that frequency stays the same, that if speed changes wavelength changes accordingly since $\lambda=c/f$ "frequency is the number of waves that pass at a given point per second" is wrong. " You have frequency of one wave, so there is no number of waves passing a point. A wave is an oscillation with frequency f which propagates , so at every point a wave reaches you have an oscillation – trula Sep 23 '22 at 10:28
  • @trula thank you this makes sense ヾ(＠⌒ー⌒＠)ノ – Yaraa Sep 23 '22 at 10:48

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