Wave Mechanics Beats Question 31
Question: Beats are produced by two waves $ y _{1}=a\sin 1000\pi t, $
$ y _{2}=a\sin 998\pi t $ The number of beats heard/sec is
[KCET 1998]
Options:
A) 0
B) 2
C) 1
D) 4
Show Answer
Answer:
Correct Answer: C
Solution:
$ n _{1}=\frac{1000\pi }{2\pi }=500Hz $ and $ n _{2}=\frac{998\pi }{2\pi }=499 $ Hz Hence beat frequency = $ n _{1}-n _{2}=1 $
BETA
