C.5 Doppler effect HL Flashcards
Formula for observed frequency when the source is moving towards the observer.
where f′is the observed frequency, f is the emitted frequency, v i
Define v in the context of the Doppler effect.
v represents the velocity of the wave, which is the speed at which the wave propagates through the medium.
What happens to the wavelength as the source moves away from the observer?
The wavelength appears longer to the observer as the distance between consecutive wavefronts increases.
Formula for observed frequency when the observer is moving towards a stationary source.
where v_o is the velocity of the observer.
Define f′ in Doppler effect equations.
f′ is the observed frequency, which is the frequency perceived by an observer due to the relative motion of the source and observer.
What does a negative v_s or v_o indicate in Doppler effect calculations?
A negative value indicates that the source (or observer) is moving away from the observer (or source).
How does the Doppler effect apply to light waves?
The Doppler effect for light waves results in a redshift when the source moves away and a blueshift when the source moves towards the observer.
Formula for calculating the change in observed wavelength due to the Doppler effect.
depending on whether the source or observer is moving.
Practical application of the Doppler effect in astronomy.
The Doppler effect is used in astronomy to determine whether a star or galaxy is moving towards or away from Earth, by observing shifts in the spectrum of light.
