12Phys Astrophysics Trial + Assessment Revision

- Parallax and Distance only

2010

(d)          Identify THREE advances in measurement technologies, and describe how they

have improved our understanding of celestial objects.     6

2009

(c)  (i)  A star was found to have a visual magnitude (V) of 2.9 and a photographic

magnitude (B) of 4.6.

Will the star be more blue or more red in colour?          1

(ii)  How can the colour index (B–V) of a star be measured in an observatory?   2

(d)  Describe the advantages of using photoelectric technologies over photographic

methods in photometry.             3

2008

2007

2006

2005

2004

2003

2002