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Lasers : Laser light is an extremely intense form of electromagentic radiation and its name is acronym for light amplification by stimulated emission of radiation. Lasers are used widely in industry and research laboratories. Their dangers stem from the enormous concentration of the energy of the laser into a very small area. These extremely short, concentrated pulses of light can cause severe eye damage. Both the cornea and the retina may be affected and permanent blind spots can be produced at the points where the lens of the eye brings the rays to a focus, thereby destroying the tissues at the back of the eye.
This focussing effect of the lens of the eye increases the intensity of the laser light by a factor of about a million (106)so low energy laser light can also be dangerous. In practice the maximum safety value is set at one-tenth of this figure. Additional dangers in the use of the laser stem from the very high voltages required to operate its source.
Explain Functions of Gastric Juice - Digestive function As the gastric juice contains water, it further liquefies the food swallowed. The hydrochloric acid acidifies the stomac
Intrusion into the Water Cycle: Water management is one of the leading concerns of man today. The natural water cycle has not been able to compensate for the effects of human
in which direction should it face/ explain why/
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Explain Total Lung Volume or Total Lung Capacity Total Lung Volume (TLV) or Total Lung Capacity (TLC): It is the volume of air remaining in the lungs after a maximal inspirati
Unit 1 : Due this friday. 11/09 ........ 150 word.. no more than 190 word Discussion topic #1: Drawing upon two major conclusions from the author, explain why the artic
A rock weighs 33.6 N on Planet X and 49 N on Earth. What is g on Planet X?
Explain the Medulla Oblongata The medulla extends from the pons above and is continuous with the spinal cord below as can be seen in Figure. It is about 2.5 cm long shaped like
Lab coats : The lab coat should fit well and should be buttoned up correctly at all times. Cotton lab coats are more suitable than those made from nylon as the former could absorb
State the categories of bulky organic manures These are evaluated mainly on the basis of their nitrogen content and the amount of organic matter present in them. The two import
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