If the amplitude of a wave at a distance r form a point source is A, the amplitude at a distance 2r will be

If the amplitude of a wave at a distance r form a point source is A, t

1.	If the amplitude of a wave at a distance r form a point source is A, the amplitude at a distance 2r will be
A.	2A
B.	A
C.	A / 2
D.	A / 4
Answer» D. A / 4