# The correct figure that shows , schematically , the wave pattern produced by superposition of two waves of frquencies 9 Hz and 11 Hz , is : Option 1)Option 2)Option 3)Option 4)

$T_0 = (11-9 )= 2 Hz \\\\ T_0 = \frac{1}{2} \sec = 0 \cdot 5 \sec$

Option 1)

Option 2)

Option 3)

Option 4)

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