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Dictionary » R » Refraction

Refraction

Definition

noun, plural: refractions

(1) (physics) The bending of wave (e.g. light) as it travels through a refractive medium.

(2) The measure of change in the direction of a wave that travels across two media of dissimilar refractive indexes.

(3) (ophthalmology) The capacity (of the eye) to refract light.


Supplement

In ophthalmology, the ability of the eyes to refract light is measured and evaluated to determine if there is a need to prescribe the use of corrective lenses.


Related form(s): refract (verb), refractive (adjective) Related term(s):


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vision in water and air.

But there are quite a lot of problems to see underwater, try it, your eyes do not like it. The refraction indices are different and that is sometimes a problem. Besides the transparency of water to light is quite limited, and different at some wavelength. So no cosmic ...

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by canalon
Sat Oct 01, 2011 10:15 pm
 
Forum: Evolution
Topic: vision in water and air.
Replies: 5
Views: 2782

DNA Gel Electrophoresis Issues - Bad Ladder Separation

... in front of a light source (or window) you can check for the absence of granule and filaments that are transparent, but with a slightly different refraction index. Those are unmelted agarose granules that do not have the same concentration than the rest of the gel. the presence of such granules ...

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by canalon
Sat Aug 13, 2011 2:30 pm
 
Forum: Genetics
Topic: DNA Gel Electrophoresis Issues - Bad Ladder Separation
Replies: 4
Views: 4070

protein X-ray

Hi, when is done the refraction of protein crystals at X-ray, the crystals are cooled to near absolute zero (0 K), right? So, how can be still some domains invisible due to mobility? At such temperatures should the move stop, shouldn't

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by JackBean
Mon May 17, 2010 8:17 am
 
Forum: Molecular Biology
Topic: protein X-ray
Replies: 0
Views: 521

Re: Eyesight under water

... the light enters the retina optimally (or close to optimal if you need glasses) only when it comes from the air. In water, to the contary, the refraction of light (the way light bends when it enters from one substance to another with different optical properties - here from air/water to the ...

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by biohazard
Fri Mar 28, 2008 11:56 am
 
Forum: Human Biology
Topic: Eyesight under water
Replies: 4
Views: 2251

The Fiber Disease

... specs on the cable when I work with it. The engineers order it, the grunts install it, I cut it, fuse it or termnate a connector, and test it for refraction and loss. I suppose I could ask the engineers or get the product number off of the sheath. It's just not something that tech's concern orselves ...

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by Sabrina
Sun Jan 14, 2007 2:40 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 4468599
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