Concept:A plane progressive wave has the same amplitude for all particles; only the phase changes along the direction of travel.
Explanation:In such a wave, each particle of the medium vibrates with the same maximum displacement.
This means neighboring points along the profile must possess the same amplitude.
Energy travels out through the medium because every particle passes its energy to the next particle in its path.
The phase of vibration, however, is different for neighboring particles.
This difference occurs because particles at different positions reach the same state of motion at different times.
Therefore, it is incorrect to say that neighboring points along the profile possess different amplitudes.
Answer:B. Neighboring points along the profile possess different amplitudes.