When a wave passes from one medium to a second medium, part of the wave is transmitted into the second medium, and part of the wave is reflected back into the first medium. When a wave splits in this manner, the amplitudes of the transmitted and reflected waves. A. each decrease at first and then become greater than the amplitude of the original wave.
B. are each equal to the the amplitude of the original wave.
C. are each greater than the amplitude of the original wave.
D. are each less than the amplitude of the original wave.

please answer fast