Notes: Doppler Effect and Spectrum To understand the Big Bang…We must first understand __________ and the ___________ ____________. What are some everyday examples of the Doppler Effect? Sound is energy passing through ______ molecules. As a sound moves towards us, there is a ____________ in the length of space between waves, causing an _____________ in frequency and ______________ in pitch. As a sound moves away from us, there is a ____________ in the length of space between waves, causing an _____________ in frequency and ______________ in pitch. A light source moving towards us will exhibit a ________ shift. A light source moving away from us will exhibit a _________ shift. Order these waves from longest to shortest (XRay, Gamma, Visible, UV, Infrared, Microwave, Radio)