Two identical strings are each under the same tension. Each string has a sinusoidal wave with the same average power. If the wave on string #2 has twice the amplitude of the wave on string #1, the wavelength of the wave on string #2 must be
a. 4 times the wavelength of the wave on string #1
b. twice the wavelength of the wave on string #1
c. the same as the wavelength of the wave on string #1
d. 1/2 of the wavelength of the wave on string #1