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GCSE Astronomy Topic 16 Practice Questions
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---3noviembre 20242024/2025A+
- A change in wavelength due to relative motion between observer and source - ANSWERSWhat is the Doppler Principle? 
 
A longer wavelength - ANSWERSIf an object is moving away what is its wavelength? 
 
Using the shift of the absorption lines - ANSWERSHow can we calculate the radial velocity? 
 
The object is moving faster - ANSWERSOn the visible spectrum if the lines move more what does that mean? 
 
v= Ho d - ANSWERSWhat is hubbles law? 
 
68 km/s/Mpc - ANSWERSWhat is hubbles constant? 
 
The di...
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