1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

IB SL Physics May05/Paper 3

  1. Jun 28, 2007 #1
    In a particular binary star system, star A has apparent brightness 8x10^(-13) and star B has apparent brightness 2x10^ (-14).

    a) Explain how it is possible to deduce that star A has a higher luminosity than star B.

    b) The surface area of star B is 10 000 times smaller than that of Star A. Calculate the ratio
    surface temperature of star B/ surface temperature of star A

  2. jcsd
  3. Jun 28, 2007 #2


    User Avatar
    Homework Helper

  4. Jun 28, 2007 #3
    a) Because Star A's temperature may be higher and the body my be larger than Star B.

    b) I got no idea how to work it out. I wasn't if i have to find all the unknowns.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: IB SL Physics May05/Paper 3