Diffraction of Waves

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Waves Learning Material
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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

Correct Answer: D

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

Physics Tutorials: This image provides visual information for the physics tutorial Diffraction of Waves

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

Correct Answer: B

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

Correct Answer: C

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