A sine wave of wavelength $\lambda $ is travelling in a medium. The minimum distance between the two particles, always having same speed, is
A$\frac{\lambda }{4}$
B$\frac{\lambda }{3}$
C$\frac{\lambda }{2}$
D$\lambda $
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C$\frac{\lambda }{2}$
c In a sine wave particles that are separated by a distance of odd multiple of half the wave length move with same speed and but in opposite direction. The minimum separation is $\frac{\lambda}{2}$
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