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.5.3 Postulates of Special Relativity – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
Which is Einstein's second postulate?
Mass depends on speed
All velocities add
Energy is conserved
The speed of light in a vacuum is the same in all inertial frames
2.
A source moving towards you at 0.4c emits light. You measure its speed as
0.6c
c
1.4c
0.4c
3.
The first postulate means that
only mechanics is relative
light needs a medium
no frame is at rest in absolute terms and the laws of physics are the same in all inertial frames
laws change with speed
4.
Which phenomenon is a direct consequence of the postulates?
Time dilation
Diffraction
Photoelectric effect
Refraction
5.
Light from the Sun takes 500 s to reach Earth. The distance is about
1.5 × 105 m
1.5 × 108 m
1.5 × 1011 m
6.0 × 105 m
6.
What did the Michelson–Morley experiment find?
Light is a particle
No difference in light speed due to Earth's motion
Light speed depends on the source
Time slows at high speed
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Part of Theme A — Space, Time and Motion — see every lesson and quiz in this unit.
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