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

E.5.6 Emission and Absorption Spectra in Stars – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
Dark lines in a star's spectrum are produced by...
the hot core
emission by the interstellar gas
nuclear fusion
atoms in its cooler outer atmosphere absorbing photons
2.
A star with a lower surface temperature than the Sun has a peak wavelength that is...
shorter
longer
the same
zero
3.
Light from a star is redshifted. The star is...
moving toward us
at rest
moving away from us
hotter than expected
4.
The peak wavelength of a star is 580 nm. Its temperature is about...
5 000 K
2 000 K
10 000 K
50 000 K
5.
The photon energy emitted when an electron drops between two levels equals...
the sum of the energies
the difference of the energies
the product of the energies
zero
6.
The wavelength shift Δλ/λ = 2.0 × 10−4 corresponds to a speed of about...
6 × 103 m s−1
6 × 105 m s−1
6 × 107 m s−1
6 × 104 m s−1
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Part of Theme E — Nuclear and Quantum Physics — see every lesson and quiz in this unit.
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