The dielectric constant of air is 1.006. The speed of Electromagnetic Wave travelling in air is where
is about
3
3.88
3.2
For an Electromagnetic Wave (in vacuum),
Velocity
Air acts almost as vacuum, hence a=3 (approx)
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5 g of Na2SO4 was dissolved in x g of H2O. The change in freezing point was found to be 3.820C. If Na2SO4 is 81.5% ionised, the value of x (K
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