Solve this:
A travelling wave in a string is represented by y = 3 sin  π 2 t π 4 x . The phase difference between two particles  separated by a distance 4cm is (take x and y in cm and t in seconds )
( 1 )   π 2 r a d                                       ( 2 )   π 4 r a d ( 3 )   π   r a d                                         ( 4 )   0

Dear student,

The equation of the string is given byy=Asin(kx-ωt)Phase difference φ=2πλxFrom the equation k=2πλ=π4so Phase difference φ=π4×4(given in the question)Phase difference φ=π rad
Option 3 is correct.
Regards
 

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