MCAT-review.org physics error???

[kehlsh]

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Disclaimer - I'm not gud at physics.

http://mcat-review.org/waves-periodic-motion.php

It says fundamental length is 3/4(lambda) for 1 open-ended standing waves.

SHouldn't it be 1/4(lambda) for fundamental wavelength... because lambda = 4L/n. Fundamental is when n = 1. And it goes 1, 3, 5 for open ended.

Thx.

 

[MCAT guy]

Disclaimer - I'm not gud at physics.

http://mcat-review.org/waves-periodic-motion.php

It says fundamental length is 3/4(lambda) for 1 open-ended standing waves.

SHouldn't it be 1/4(lambda) for fundamental wavelength... because lambda = 4L/n. Fundamental is when n = 1. And it goes 1, 3, 5 for open ended.

Thx.

open is L = lamda n/2

Or easy way to remember is the length is in half wave lengths

one end closed is

L = lamda n/4

using n is odd

 

[kehlsh]

open is L = lamda n/2

Or easy way to remember is the length is in half wave lengths

one end closed is

L = lamda n/4

using n is odd

I know that, I'm asking whether fundamental length of one end closed is (3/4) lambda as MCAT-review says. I believe it's 1/4 lmbda.

 

[GRod18]

your right,

that site does have errors on it since it is not a published site with many peer reviews.

http://image.tutorvista.com/content/waves/closed-pipe-vibration-modes.gif


first fundamental should be just 1/4 wavelength for pipes open in one end.