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Radiography and depletion of Ozone layer:
What is Radiography?
A. The method in which soft X-rays are used in medical diagnosis is called radiography.
What are the uses of Hard x-rays?
A. Hard x-rays are used to determine the structure of materials and to test the materials in industry.
What is the reason of depletion of Ozone layer in atmosphere?
A. The ozone layer is depleted due to the Chemical reactions with fluoro carbons released from aerosol sprays, refrigeration equipments and other pollutants.
Choroid: Inside the sclera it is thin, non transparent or opaque. Its front part of iris there is an aperture known as the pupil which control amount of light entering the eye.
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In a single slit diffraction pattern the distance between the first minimum on left to first minimum on the right is 0.054 cm for a light of wavelength 5890 Å. Determine
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A sodium cation has different number of electrons from: (1) O 2- (2) F - (3) Li + (4) Al +3 Ans: Li +
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Use the mirror equation to deduce that: (a) an object placed between f and 2 f of a concave mirror produces are al image beyond 2f. (b) a convex mirror alwa
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