Sunburn is caused by UV radiation, either from the sun or from artificial sources, such as tanning lamps, welding arcs, or ultraviolet germicidal irradiation. It is a reaction of the body to direct DNA damage from UVB light. This damage is mainly the formation of a thymine dimer.xcessive UV radiation is the leading cause of primarily non-malignant skin tumors. Sunscreen is widely agreed to prevent sunburn and some types of skin cancer. Clothing, including hats, is considered the preferred skin protection method.
A protractor is used to measure angles. When surveying a theodolite is used. There are a number of tools on the market that perform angle measurement. A <b>protractor</b> is used to measure angles.<br />When surveying a <b>theodolite</b> is used.<br />There are a number of tools on the market that perform angle measurement. Minor edit?
Industrial borescopes allow for remote visual inspections (RVI) in areas where it is difficult or impossible for the human eye to see into directly.However, the term âborescopeâ has become a generic term to describe four types of products/technologies used for internal inspections.While there are key differences between these inspection cameras, the earliest RVI product was called a âborescopeâ â the name stuck even as new technologies were developed.igid borescopes are simple tubes shaped like long, thin telescopes that use a lens system to send an image to a relay lens from the object to be viewed in real-time. This is accomplished with an eyepiece on the proximal (near) end and an angled mirror pointed toward an opening in the tube on the distal (far) end.