Turn on thread page Beta
    • Thread Starter
    Offline

    6
    ReputationRep:
    On the June 2014 OCR G485 paper, Paper- http://www.ocr.org.uk/Images/243747-...physics.pdfFor question 9e why couldn't you say ‘Sirius / star is moving towards us' because I thought Hubble's Law applies to receding galaxies (ok the star is not in a distant galxy but if it was then what?).Answers- http://www.ocr.org.uk/Images/236085-...ysics-june.pdf
    Offline

    20
    ReputationRep:
    (Original post by runny4)
    On the June 2014 OCR G485 paper, Paper- http://www.ocr.org.uk/Images/243747-...physics.pdfFor question 9e why couldn't you say ‘Sirius / star is moving towards us' because I thought Hubble's Law applies to receding galaxies (ok the star is not in a distant galxy but if it was then what?).Answers- http://www.ocr.org.uk/Images/236085-...ysics-june.pdf
    Well Hubbles law only applies to distant galaxies is about right for a 1 mark question... you might additionally say something about gravitational binding I suppose.

    ---
    Sirius appears as a very bright naked eye star from Earth

    discovering Hubbles law required a leap in telescope technology (especially apeture size) in the early 20th century because it required collecting spectra from such distant objects. These galaxies aren't just a little bit further away than naked eye stuff.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: May 2, 2016

University open days

  • University of East Anglia
    All Departments Open 13:00-17:00. Find out more about our diverse range of subject areas and career progression in the Arts & Humanities, Social Sciences, Medicine & Health Sciences, and the Sciences. Postgraduate
    Wed, 30 Jan '19
  • Solent University
    Careers in maritime Undergraduate
    Sat, 2 Feb '19
  • Sheffield Hallam University
    City and Collegiate Campus Undergraduate
    Sun, 3 Feb '19
Poll
Brexit: Given the chance now, would you vote leave or remain?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.