1
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Two stationary sources each emitting waves of wavelength $$\lambda $$, an observer moves from one source to another with velovcity u. Then number of beats heard by him
A
$${{2u} \over \lambda }$$
B
$${u \over \lambda }$$
C
$$\sqrt {u\lambda } $$
D
$${u \over {2\lambda }}$$

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