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Physics
Physics
Problem
Two sound waves of frequencies
f
1
f_1
f
1
and
f
2
f_2
f
2
travel through the same air column and are heard simultaneously. The beat frequency detected by a listener is given by which of the following expressions? a)
f
1
+
f
2
f_1 + f_2
f
1
+
f
2
b)
∣
f
1
−
f
2
∣
|f_1 - f_2|
∣
f
1
−
f
2
∣
c)
f
1
+
f
2
2
\dfrac{f_1 + f_2}{2}
2
f
1
+
f
2
d)
f
1
−
f
2
f_1 - f_2
f
1
−
f
2
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