Curriculum
Course: IB Physics SL
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Curriculum

IB Physics SL

Theme A — Space, Time and Motion

0/80 Dr Dabour Hub Science Diagram and Course Material

Theme B — The Particulate Nature of Matter

0/87 Dr Dabour Hub Science Diagram and Course Material

Theme C — Wave Behaviour

0/60 Dr Dabour Hub Science Diagram and Course Material

Theme D — Fields

0/41 Dr Dabour Hub Science Diagram and Course Material

Theme E — Nuclear and Quantum Physics

0/59 Dr Dabour Hub Science Diagram and Course Material

Tools and Inquiry — IB Physics skills

0/54 Dr Dabour Hub Science Diagram and Course Material
Quiz

C.3.3 Diffraction of Waves – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
Diffraction is greatest when the gap width is
Much larger than the wavelength
Zero
Comparable to the wavelength
Much larger than the amplitude
2.
A wave passes through a narrow gap. The diffracted wave has the same
Amplitude
Wavelength
Intensity
Direction
3.
Why can you hear someone around a corner but not see them?
Sound wavelengths are comparable to the opening, light wavelengths are far smaller
Sound travels faster than light
Light is absorbed by walls
Light cannot refract
4.
Water waves of wavelength 4.0 cm meet a gap of 4.0 cm and then a gap of 40 cm. The wavefronts spread less with the
4.0 cm gap
Neither
Both equally
40 cm gap
5.
In the Huygens picture, waves curve at the gap edges because
The speed changes at the edge
The frequency drops
Wavelets are missing beyond the edge to complete the envelope
The medium absorbs the wave
6.
A telescope uses a larger mirror to
Increase the wavelength
Reduce diffraction blurring and see finer detail
Make light slow down
Polarize light
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Part of Theme C — Wave Behaviour — see every lesson and quiz in this unit.
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