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Topic: A negative relationship between refractive index and concentration  (Read 4126 times)

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Offline yakir12

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A negative relationship between refractive index and concentration
« on: March 03, 2007, 09:54:01 AM »
Hi!
Is there any known compound that has a negative relationship between its refractive index and its concentration.
That is, raising the concentration of this hypothetical solution will actually lower its refractive index.
Thanks in advance for any effort,
Cheers.
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Offline eugenedakin

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Re: A negative relationship between refractive index and concentration
« Reply #1 on: March 21, 2007, 11:58:37 PM »
Hello yakir12,

Hmm.... I have worked with refractive index for many years.  All of them have positive relationships. 

If you do happen to find one, send me an e-mail, as it would be interesting to know.

Sincerely,

Eugene
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Offline eugenedakin

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Re: A negative relationship between refractive index and concentration
« Reply #2 on: March 27, 2007, 12:04:34 PM »
Ahh.. yes.. found one...

Nd of Methanol and Water.    As the concentration of methanol increases, the Nd decreases (20 Celcius).

 ;)

Eugene
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