A Wave Given with Amplitude a = 10 Cm Travels

Multiple Choice

A wave given with amplitude A = 10 cm travels along a cord which has two sections,one with linear density 0.1 kg/m and the other with linear density 0.2 kg/m.The wave travels along the cord from the lighter density to the heavier.If the tension in the cord is 50 N,the amplitude of the reflected wave is

A) 0.65 cm
B) 1.5 cm
C) 5.9 cm
D) 7.4 cm
E) 8.3 cm