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a) the two factors are
Speed of light ray
Optical Density of the medium
b) it is possible because pop shares half water molecule.
When it comes in contact with air then gypsum is formed
CaSo4. 1/2 H2O ---> CaSo4. 2H2O
Speed of light ray
Optical Density of the medium
b) it is possible because pop shares half water molecule.
When it comes in contact with air then gypsum is formed
CaSo4. 1/2 H2O ---> CaSo4. 2H2O
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