Independant Guide for Reflector Telescope Buyer.

Reflector telescopes use a mirror to receive and

focus light emanating from celestial objects including those from our own solar system. Since these objects or stars are very far away from you, the light rays reaching the earth and your telescope are parallel. These fall on the mirror inside your telescope which has a parabolic profile and this facilitates in reflecting the rays to a single point. Hence they have the name reflector telescope.  In addition, as opposed to

Skywatcher refractor telescopes, they do not suffer from chromatic aberration (distortion in color) since all wavelengths get reflected from your mirror equally. Apart from this, reflector telescopes have the benefit of  being made in substantial size, they are cheaper than refractor telescopes of same size and since light is reflected rather than passing through, only one side need to be optically perfect. Regrettably, they also have some negatives. The optics may get misaligned and  they need frequent cleaning. Also, where secondary mirrors, either curved (convex) or plain, are used they may produce glare caused by bright stars.

H2S Analyzers

The primary detection

technology of H2S Analyzers by ANALYTICAL SYSTEMS INTERNATIONAL has three advantages based on the chemistry and physics involved."No interference" is proven by years of experience with various applications where no other chemical reaction with lead acetate has been found to darken the sensing tape except H2S. This ensures that only a sulfur-specific reaction will occur. "Linear response "indicates that the rate of tape darkening is linear with respect to the H2S concentration. The benefit of this response is the straight forward relationship between the measured variable and quantity units. Equipment maintenance is easier and only a single point calibration is required. "Parts per billion sensitivity" relates to measurements that can be made even when the H2S concentration is only one one-billionth of the total volume. This accuracy benefits the user in determining acceptable levels that can be monitored.

Clean And Safe Drinking Water

Access To Clean And Safe Drinking Water

Access to clean and safe drinking water is a fundamental human need and therefore, a basic right. Contaminated water jeopardizes both the physical and social health of all people and it is an affront to human dignity. Over the last, there has been frantic preoccupation of constructing and expanding water supplies and it is only in the latter part of the decade that more attention is being given to the investigation, protection and control of the installations, which supplysafe drinking water. 

How to Pass Your Driving Test the First Time

In order to legally operate a vehicle

you will first need to take and pass a driving test to make sure that you are capable of driving that type of vehicle safely. A driving test will often consist of a practical driving test, along with a theoretical test which ensures that you are knowledgeable about the road rules and regulations in your country. Some people find taking driving lessons and tests a stressful experience. This article provides several top tips that will help you to pass your driving test first time.