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Questions and Answers
What is the relationship between frequency and wavelength?
What is the relationship between frequency and wavelength?
- Shorter wavelengths have higher frequencies (correct)
- Shorter wavelengths have lower frequencies
- Longer wavelengths have higher frequencies
- Longer wavelengths have lower frequencies
What is the shift in wavelength called when it is towards longer wavelengths?
What is the shift in wavelength called when it is towards longer wavelengths?
- Blueshift
- Redshift (correct)
- Green shift
- Yellow shift
How are waves affected when the source moves towards the observer?
How are waves affected when the source moves towards the observer?
- Waves are redshifted
- Waves are unaffected
- Waves are blueshifted (correct)
- Waves are amplified
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Study Notes
- The Doppler effect applies to both sound and light waves.
- The frequency of observed light is different from the emitted frequency when the source of light is moving relative to the observer.
- A frequency shift in visible light can result in a change of color.
- Longer wavelengths have lower frequencies and shorter wavelengths have higher frequencies.
- Blue light has a shorter wavelength than red light.
- Shifts towards longer wavelengths are called "redshifts" and shifts towards shorter wavelengths are called "blueshifts".
- A shift in wavelength implies a shift in frequency.
- When the source moves towards the observer, waves are blueshifted.
- When the source moves away from the observer, waves are redshifted.
- The same ideas that apply to the Doppler effect with sound can be applied to the Doppler effect with light.
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