How fast is the star moving? (Doppler effect)

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SUMMARY

The discussion focuses on calculating the speed of a star using the Doppler effect, specifically analyzing a star that emits light at a frequency of 6.00 × 1014 Hz and appears to emit at 6.01 × 1014 Hz. The relevant equation provided is z = (λ observed - λ emitted) / λ observed, which relates the observed and emitted wavelengths. Participants emphasize the importance of showing work and using algebra to express z in terms of frequencies before substituting values.

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Homework Statement
how fast is the star moving problem doppler effect
Relevant Equations
z= λ observed - λ emitted/ λ observed
A type of star that usually emits light at a frequency of 6.00 × 10^14 Hz appears to emit light at a frequency of 6.01 × 10^14 Hz.
Calculate how fast the star is moving, and if it moving towards us or away from us.
 
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Welcome to PhysicsForums. :smile:

Per the PF rules, you need to show your best efforts to start working the problem before we can offer tutorial help.
 
yeah sure
 

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Please post a better image of your work (not sideways, good contrast and legible), or better yet please type your work into the forum. See the LaTeX Guide link in the lower left of the Edit window to learn how to post math equations here. Thanks.
 
HalJordan2814 said:
yeah sure
The answer looks correct, although you don't say what's the direction of motion.
 
HalJordan2814 said:
Homework Statement:: how fast is the star moving problem doppler effect
Relevant Equations:: z= λ observed - λ emitted/ λ observed

A type of star that usually emits light at a frequency of 6.00 × 10^14 Hz appears to emit light at a frequency of 6.01 × 10^14 Hz.
Calculate how fast the star is moving, and if it moving towards us or away from us.
Did you consider doing a bit of algebra to get ##z## in terms of frequencies before you plugged the numbers in?
 

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