Question

The stationary waves set up on a string have the equation: $y=\left(2mm\right)\sin \left[\left(6.28m^{-1}\right)x\right]\cos \omega t$ The stationary wave is created by two identical waves, of amplitude A each, moving in opposite directions along the string.Then:

• A. A=2 mm
• B. A=1 mm
• C. the smallest length of the string is 50 cm
• D. the smallest length of the string is 2 m.

Answer 1

Answer: (A), (C)

The correct options are
A A=2 mm
C the smallest length of the string is 50 cm