Curriculum
Course: IB Physics HL
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Curriculum

IB Physics HL

Theme A — Space, Time and Motion

0/125 Dr Dabour Hub Science Diagram and Course Material

Theme B — The Particulate Nature of Matter

0/105 Dr Dabour Hub Science Diagram and Course Material

Theme C — Wave Behaviour

0/73 Dr Dabour Hub Science Diagram and Course Material

Theme D — Fields

0/77 Dr Dabour Hub Science Diagram and Course Material

Theme E — Nuclear and Quantum Physics

0/89 Dr Dabour Hub Science Diagram and Course Material

Tools and Inquiry — IB Physics skills

0/43 Dr Dabour Hub Science Diagram and Course Material
Quiz

B.1.13 Apparent Brightness and Luminosity – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
Luminosity is measured in
K
W m−2
W
J
2.
If the distance to a star doubles, b becomes
a quarter
double
unchanged
half
3.
A star has L = 4.0 × 1028 W at 8.0 × 1016 m. Its b is closest to
5.0 × 10−9 W m−2
4.0 × 10−8 W m−2
6.4 × 10−10 W m−2
5.0 × 10−7 W m−2
4.
Which quantity is intrinsic to the star?
Apparent brightness
Luminosity
Distance
Observed colour only
5.
Two stars appear equally bright; one is three times further away. Its luminosity is
the same
1/9
3 times
9 times
6.
A standard candle is used to find
distance
mass
age
temperature
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Part of Theme B — The Particulate Nature of Matter — see every lesson and quiz in this unit.
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