what is the speed of light???
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plaster of Paris is a white colour substance that becomes hard when come in the contact of water. it is prepared from the gypsum by heating it .
POP=Caso4.1/2H2O.
Calcium sulphate hemi hydrate.
it is prepared by heating the gypsum at 369 k of temperature.
this is stored in moisture proof container because it becomes hard when comes in the contact of water or moisture.
it is used for making statues and buildings.
it is also used to support fracture.p
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The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is defined as 299792458 metres per second
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