ib 4.5 waves hodder 2ed

Question 1 A transverse wave is travelling along a stretched rope. Consider two points on the rope that are exactly half a wavelength apart. The velocities of the rope at these two points are always:

• A the same as each other
• B constant
• C in opposite directions
• D in a direction that is parallel to the direction in which the wave is travelling

Question 2

• A zero
• B always constant
• C about to increase
• D about to decrease

Question 3 A transverse progressive wave is being transmitted through a medium. The wave speed is best described as:

• A the speed at which energy is being transferred
• B the average speed of the oscillating particles in the medium
• C the speed of the medium
• D the speed of the source of the waves

Question 4 Light waves of wavelength λ, frequency f and travelling at speed c enter a transparent material of refractive index 1.6. Which of the following describes the wave properties of the transmitted light waves?

• A wavelength 1.6λ; speed c
• B frequency 1.6f; speed c/1.6
• C wavelength λ/1.6; frequency f
• D wavelength λ; speed c/1.6

Question 5 When plane wavefronts meet an obstacle they may be diffracted. Which of the following diagrams is the best representation of this effect?

• A
• B
• C
• D

Question 6 Which of the following is a possible definition of the wavelength of a progressive (travelling) transverse wave?

• A the distance between any two crests of the wave
• B the distance between a crest and an adjacent trough
• C the amplitude of a particle in the wave during one oscillation of the source
• D the distance moved by a wavefront during one oscillation of the source

Question 7

• A disappear
• B cause the end of the rope at Y to oscillate up and down
• C be reflected and be inverted
• D be reflected and not be inverted.

Question 8

• A 𝐼₀
• B 𝐼₀/2
• C 𝐼₀/4
• D 𝐼₀/8

Question 9 Which of the following describes standing waves on stretched strings?

• A All points on the waves move with the same amplitude.
• B All points on the waves move with the same phase.
• C All points on the waves move with the same frequency.
• D The wavelength is the distance between adjacent antinodes.

Question 10 A source of sound of a single frequency is positioned above the top of a tube that is full of water. When the water is allowed to flow out of the tube a loud sound is first heard when the water is near the bottom, as shown in all the diagrams. Which diagram best represents the standing wave pattern that produced that loud sound?

• A
• B
• C
• D