A) \[10,5,\frac{5}{2}\]
B) \[20,\frac{20}{3},\frac{20}{5}.....\]
C) \[30,20,10.....\]
D) \[35,25,15.....\]
Correct Answer: B
Solution :
Path difference \[\Delta x(SA+AP)-SP\] \[\Rightarrow \] \[\Delta x=(65+65)-120\] \[\Rightarrow \] \[\Delta x=10\,m\] But at A the wave suffers reflection at the surface of rigid/fixed end or denser medium hence the wave must suffer an additional path change of \[\frac{\lambda }{2}\]on a phase change of\[\pi \].You need to login to perform this action.
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