# Waves

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Thread starter 6 years ago
#1

Why does the speed not change?

Thanks!
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6 years ago
#2
The complete question would be helpful.
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Thread starter 6 years ago
#3
(Original post by Stonebridge)
The complete question would be helpful.
Oh yeah sorry:

here it is.
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6 years ago
#4
(Original post by Zenarthra)

Why does the speed not change?

Thanks!
Are you asking why the speed of the water waves doesn't change?

Why should they?
Does the speed of sound change if you change the frequency by a couple of Hz?
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Thread starter 6 years ago
#5
(Original post by Stonebridge)
Are you asking why the speed of the water waves doesn't change?

Why should they?
Does the speed of sound change if you change the frequency by a couple of Hz?
Ahh ok, but what if you changed it by alot of Hz?

And look this thread please:
http://www.thestudentroom.co.uk/show....php?t=2681400
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6 years ago
#6
(Original post by Zenarthra)
Ahh ok, but what if you changed it by alot of Hz?

And look this thread please:
http://www.thestudentroom.co.uk/show....php?t=2681400
At A Level you normally consider the speed of the wave (sound/water/light) doesn't change if you change the frequency of the waves. This enables you to use the v=fλ formula.

You will find if you study physics to a more advanced level, that the speed of the wave can change with frequency, it's called dispersion.
You don't need to worry about it at this level. Unless you are told differently, assume the speed of sound, light or water waves is constant in that particular medium.
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Thread starter 6 years ago
#7
(Original post by Stonebridge)
At A Level you normally consider the speed of the wave (sound/water/light) doesn't change if you change the frequency of the waves. This enables you to use the v=fλ formula.

You will find if you study physics to a more advanced level, that the speed of the wave can change with frequency, it's called dispersion.
You don't need to worry about it at this level. Unless you are told differently, assume the speed of sound, light or water waves is constant in that particular medium.
Ahh ok thanks alot!
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