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CAIE IGCSE Physics 3.1.9 Wavelength and Gap Size Affects Questions

Practise predicting and drawing diffraction from the wavelength-to-gap ratio, comparing semicircular spreading with nearly straight transmitted wavefronts.

Syllabus
2026–2028
Course
Physics 0625

Exam points

  • Distinguish scalars from vectors by direction and classify common physics quantities.

CAIE IGCSE Physics 3.1.9 Wavelength and Gap Size Affects Questions question 1

[Maximum number: 2]

Fig. 5.1 shows successive crests of a wave after a plane wave has passed through a gap.

Fig. 5.1

Fig. 5.1

Fig. 5.2 shows a much wider gap. A plane wave of the same wavelength as in (b)(i) is incident on the gap from the left side of the barrier.

Fig. 5.2

Fig. 5.2

On Fig. 5.2, draw three successive crests of the wave after the wave has passed through the gap.
[Total: 85

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