The expression for pointing vector of an isotropic point source at a distance ‘r’ from the source is given by:

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answerhappygod
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The expression for pointing vector of an isotropic point source at a distance ‘r’ from the source is given by:

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a) P/ 4πR2
b) P/4π
c) P/ 4πR
d) P×4πR2
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