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9.5 Doppler Effect Lecture

• Topic
• 9.5 is an extension of SL Core Topic 4.
• Essential
• idea:
• The Doppler effect describes the phenomenon
• of
• wavelength/frequency shift when relative
• motion
• occurs
• between a source of waves & an observer.
• Nature
• of science: Technology: Although originally based
• on
• physical observations of the pitch of fast moving
• sources
• of sound, the Doppler effect has an
• important
• role
• in many different areas such as evidence
• for
• the
• expansion of the universe and generating
• images
• used
• in weather reports and in medicine scans.