Wednesday, January 28, 2009

Refractometers

The refractive index (or index of refraction) of a medium is a measure for how much the speed of light (or other waves such as sound waves) is reduced inside the medium.

The refractive index, n, of a medium is defined as the ratio of the phase velocity, c, of a wavelight or sound in a reference medium to the phase velocity, vp, in the medium itself:
phenomenon such as

n = \frac{c}{v_{\mathrm {p}}}

Got all that? If so, you can stop reading now.

This week, a look at refractometers.

TTFN, Fred.

Quote of the week: "Dreams come true. Without that possibility, nature would not incite us to have them." - John Updike (US author, 1932 - 2009)

(scroll over or click on iPaper below to have a drop-down menu that includes a print option)

Refractometers


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