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

A.5.11 Muon Lifetime Experiment – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
The proper lifetime of a muon is about
2.2 ms
2.2 s
2.2 ns
2.2 μs
2.
Why do muons reach sea level in the Earth frame?
They have no mass
Their lifetime is dilated
The atmosphere is thinner
They speed up
3.
In the muon's frame the survival is explained by
reduced gravity
time dilation of the muon
length contraction of the atmosphere
muon mass
4.
For γ = 10 and τ₀ = 2.2 μs, the Earth-frame lifetime is
22 μs
2.2 μs
220 μs
0.22 μs
5.
A muon at 0.80c starts 5.0 km above the ground (Earth frame). In the muon's frame the distance is
8.3 km
5.0 km
3.0 km
4.0 km
6.
If relativity were ignored the number of muons reaching sea level would be
much greater
much smaller than observed
exactly zero
unchanged
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Part of Theme A — Space, Time and Motion — see every lesson and quiz in this unit.
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