The expression for pointing vector of an isotropic point source at a d – 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/ 4 R<sup>2</sup>
B.	P/4
C.	P/ 4 R
D.	P 4 R<sup>2</sup>
Answer» B. P/4

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