# Diffraction of Waves

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Waves Learning Material
Tutorial IDTitleTutorialVideo
Tutorial
Revision
Notes
Revision
Questions
11.7Diffraction of Waves

## Physics Revision Questions for Diffraction of Waves

1. Straight parallel water waves of 80 cm distance from each other pass through four openings of different size. In which opening does not occur any noticeable diffraction?

1. 8 mm
2. 8 cm
3. 80 cm
4. 8 m

2. A number of straight and parallel water waves are shown in the figure below.

The distance between every two crests is 6 cm. After passing through two small gaps that are 30 cm away from each other, water diffracts and circular wavefronts are produced.

Calculate the wave speed if the time needed for the interference to produce is 10 s.

1. 3 cm/s
2. 4 cm/s
3. 5 cm/s
4. 6 cm/s

3. How many simultaneous sound wavefronts of frequency equal to 800 Hz are produced when sound passes through a 85 cm wide door?

1. 0
2. 1
3. 2
4. 3

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5. Continuing learning waves - read our next physics tutorial: Types of Waves. The Simplified Equation of Waves