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Precautions : The following precautions should be taken while using UV lamps:
1) TJV lamps must always be properly shielded.
2)Wear approved goggles when working with or close to the source.
3) As a minimum precaution, view through pyrex glass as this material absorbs UV light and is thus largely opaque to radiation of this wavelength.
4) Protect your skin with thick cloth or by suitable barrier cream if necessary.
5 ) Ensure good ventilation to guard against the dangers of inhaling ozone, which can be produced by the effect of UV on the oxygen in the air.
why do we breathe?
Role of communication in promoting education: Transmission of knowledge and information, which is the first step in education, is obviously possible only through communication
A model reaction water turbine Use a soda water bottle from which the bottom has been separate. Wind string around it near the bottom end and suspend it as shown in the diagram
Explain the amount of Glucose in Urine Detectable amount of glucose is only found in the urine when the blood level exceeds a certain threshold value i.e., 180 mgI100 ml. In un
The effect of petrol on surface tension Being sure that the plate is has to be clean. It is wise to rinse the plate in cold water for a time before filling it. Instead of soap,
Experiments with man in space: We have already discussed the usefulness of space flights in Blocks 3&4. One is able to make astronomical observations from satellites; get met
Explain the Factors Controlling Movements of Gall Bladder Contraction of gall bladder can be controlled by reflex action, by the presence of foodstuff in the duodenum and by th
Palaeontological Evidence: Palaeontology is a branch of earth sciences, which is essentially a study of plant and animal life in the past geological periods, millions of ye
100 W m-2 + 4.56 J s-1 m-2 – 23.567 W m-2 =
How to make a constellarium A constellarium is a simple device used in teaching the shapes of several constellations. Get a cardboard or wood box and remove one end. Draw the s
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