OpenStax Physics (High School)
Lesson Plan
Doppler Effect and Sonic Booms
Goals / Objectives
Describe the Doppler effect and explain why it occurs in terms of wavefronts and relative motion
Apply the Doppler shift formula for a moving source to find the observed frequency
Apply the Doppler shift formula for a moving observer, choosing the correct sign
Explain how a sonic boom forms as a source approaches and exceeds the speed of sound
Recognize that the Doppler effect occurs for all waves, not only sound
Standards
14.3
"The Doppler effect is a change in the observed pitch of a sound, due to relative motion between the source and the observer." "For a stationary observer and a moving source of sound, the frequency (f<sub>obs</sub>) of sound perceived by the observer is $f_{obs} = f_s\left(\frac{v_w}{v_w \pm v_s}\right)$ ... The minus sign is used for motion toward the observer and the plus sign for motion away from the observer." "A sonic boom is a constructive interference of sound created by an object moving faster than sound."
Academic Vocabulary
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Anticipatory Set / Bell Work
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