Pentatope number: Difference between revisions

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A '''toroidal mirror''' is a form of [[parabolic reflector]] which has a different focal distance depending on the angle of the mirror. The curvature is actually that of an elliptic [[paraboloid]] with <math>a \ne b</math>If the shape were that of a [[toroid]], the mirror would exhibit [[Aberration in optical systems|spherical aberration]].
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Toroidal mirrors are used in  [[Reflecting_telescope#Yolo | Yolo telescope]]s and optical [[monochromator]]s. In these devices, the source and detectors of the light are not located on the optic axis of the mirror, so the use of a true paraboloid of revolution would cause a distorted image.
 
==See also==
* [[List of telescope types]]
 
==External links==
 
* [http://bhs.broo.k12.wv.us/homepage/alumni/dstevick/erwin_c.htm Toroidal mirrors for Yolo telescopes]
 
[[Category:Mirrors]]
[[Category:Telescope types]]
 
{{astronomy-stub}}
{{optics-stub}}

Latest revision as of 04:15, 16 September 2014

If you want to speed up a PC then you have come to the right place. I will show you, at the moment, five fast ways to drastically better the computer's performance.

So one day my computer suddenly started being weird. I was thus frustrated, because my files were lost, and I cannot open the files which I needed, and then, suddenly, everything stopped working!

With the Internet, the risk to a registry is a bit more plus windows XP error messages would appear frequently. Why? The malicious wares like viruses, Trojans, spy-wares, ad wares, and the like gets recorded too. Cookies are ideal examples. You get to protect passwords, and stuff, proper? That is a simple example of the register functioning.

If you feel we don't have enough funds at the time to upgrade, then the greatest option is to free up some area by deleting a few of the unwanted files and folders.

In a word, to accelerate windows XP, Vista startup, it's very important to disable some business products and clean plus optimize the registry. You are able to follow the steps above to disable unwanted programs. To optimize the registry, I recommend you utilize a tuneup utilities software. Because it is really risky for we to edit the registry by yourself.

Another key element when we compare registry cleaners is having a facility to manage your start-up jobs. This merely signifies which you can select what programs you want to commence whenever you commence your PC. If you have unwanted programs starting whenever you boot up the PC this usually lead to a slow running computer.

Reboot PC - Just reboot your PC to find if the error is gone. Frequently, rebooting the PC readjusts the internal settings and software plus therefore fixes the problem. If it doesn't then move on to follow the instructions under.

Thus, the best thing to do when a computer runs slow is to purchase an authentic plus legal registry repair tool which would assist we eliminate all issues related to registry plus enable you enjoy a smooth running computer.