Define the following terms: a. Rarefaction - b. Beats - C. Constructive interference - d. Refraction - e. Wavelength - f. Frequency - 1. Complete the table comparing transverse to longitudinal waves Sketch 2 Parts that make them up How it vibrates compared to motion Example Longitudinal Transverse 2. Describe one main difference between mechanical and non-mechanical waves. 3. Complete the statements about the lab simulation from class. a. As light travels from a more dense substance into a less dense substance, its velocity and it bends the normal. b. According to the Doppler Effect, a lower frequency is heard if the observer moves source of the frequency or the source of the frequency moves the to the observer.