11 Waves 2020 J&N [EUT]

Which row correctly describes light waves?

• longitudinal wave, direction of vibration parallel to direction of wave travel

• longitudinal wave, direction of vibration perpendicular to direction of wave travel

• transverse wave, direction of vibration parallel to direction of wave travel

• transverse wave, direction of vibration perpendicular to direction of wave travel

The diagram shows two pieces of wood resting in shallow water of constant depth. Straight, parallel wavefronts approach the pieces of wood as indicated. The gap between the pieces of wood is 2.0 cm wide. The wavefronts are 3.0 cm apart. What is the appearance of the wavefronts after they pass through the gap?

• semicircular and 2.0 cm apart

• semicircular and 3.0 cm apart

• straight and 2.0 cm apart

• straight and 3.0 cm apart

Waves travel across the surface of water. What is meant by the amplitude of the wave?

• the maximum distance of a water particle from its mean position

• how far the wave travels every second

• the number of waves passing a point every second

• the distance between the top of consecutive waves

The diagram shows a wave. It is not drawn to scale. What are the amplitude and the wavelength of the wave?

• amplitude 1.0 m, wavelength 1.0 m

• amplitude 1.0 m, wavelength 2.0 m

• amplitude 2.0 m, wavelength 2.0 m

• amplitude 2.0 m, wavelength 3.0 m

The diagram shows part of a diffracted wave pattern. Changes are made to the wavelength and to the gap size to produce a semicircular diffracted wave pattern. Which row produces the required semicircular diffracted wave pattern?

• larger gap in barrier, same wavelength

• larger gap in barrier, smaller wavelength

• same gap in barrier, larger wavelength

• same gap in barrier, smaller wavelength

A water wave has a speed of 2.0 m/s. 4.0 complete waves pass a point every 10 seconds. What is the wavelength of the wave?

• 0.50 m

• 0.80 m

• 5.0 m

• 8.0 m

Waves on the surface of water travel from deep to shallow water. Which diagram shows the correct path of the waves in the shallow water?

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Four students A, B, C and D, investigate the diffraction of water waves through a gap. Each student uses a different gap size and a different wavelength for the water waves. Which student produces the waves which have the most diffraction?

• A

• B

• C

• D

The diagrams show examples of wave motion. Which waves are longitudinal?

• 1 only

• 2 and 3 only

• 2, 3 and 4

• 2 and 4 only

The diagram shows a wave. What are the amplitude and the wavelength of this wave?

• amplitude: 3 cm, wavelength: 4 cm

• amplitude: 3 cm, wavelength: 8 cm

• amplitude: 6 cm, wavelength: 4 cm

• amplitude: 6 cm, wavelength: 8 cm