# data[].attributes.body
Wavelength/ Period = Velocity

# data[].attributes.attachment_caption
When waves pass through an opening whose dimensions are comparable to the wavelength, (ap-physics-2-course-and-exam-description, P. 158: 916)

# data[].attributes.body
When the media changes, the velocity changes so refraction can be observed

# data[].attributes.body
X(t) = A.Sin (w.t)