A) 20 m/s
B) 10 m/s
C) 5 m/s
D) 2.1 m/s
Correct Answer: D
Solution :
Number of beats\[\Delta n={{n}_{1}}-{{n}_{2}}\] For no beats observed, \[{{n}_{1}}-{{n}_{2}}=0\] \[\therefore \] \[\left( \frac{\upsilon -{{\upsilon }_{0}}}{\upsilon } \right)\times 324-\left( \frac{\upsilon +{{\upsilon }_{0}}}{\upsilon } \right)\times 320=0\] where, \[{{\upsilon }_{0}}=\]speed of observer and \[\upsilon =\]344 m/s On solving, \[{{\upsilon }_{0}}=2.1\] m/secYou need to login to perform this action.
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