The expression for pointing vector of an isotropic point source at a – McqOptions

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1.	The expression for pointing vector of an isotropic point source at a distance ‘r’ from the source is given by:
A.	P/ 4πR2
B.	P/4π
C.	P/ 4πR
D.	P×4πR2
Answer» B. P/4π

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