CAIE IGCSE Physics 3.1.10 Wavelength Affects Diffraction At an Questions

Practise explaining waves bending around an edge and predict why longer-wavelength sound or radio signals reach shadow regions more effectively.

Exam points

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

[Maximum number: 3]

The speed of sound in air is $340 \mathrm{~m} / \mathrm{s}$ .

Fig. 6.1 shows a band in front of a building.

Fig. 6.1

The drum produces a low frequency sound. Other musical instruments produce a high frequency sound. These sounds are equally loud.

A young man at the side of the building hears the drum but not the high frequency sounds from the other musical instruments.

Explain why this happens.

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CAIE IGCSE Physics 3.1.10 Wavelength Affects Diffraction At an Questions question 1