Target: 10 Questions in 10 minutes

An IB Physics data booklet is helpful

 1. Which of these waves is NOT an electromagnetic wave?

  • A. radio wave
  • B. sound wave
  • C. X-ray
  • D. visible light

2. Which of these answers correctly identifies longitudinal and transverse waves?

 longitudinal Transverse
A
 sound X-ray
B
 visible light X-ray
C
 visible light gamma ray
D
 X-ray visible light

3. An electromagnetic wave has a wavelength approximately 100 times longer than visible light. This wave will be classed as a(n).......

  • A. infrared wave
  • B. sound wave
  • C. microwave
  • D. ultraviolet wave

4. Waves can be measured in many ways. Which of these answers correctly identifies the units used to measure the wavelength and period of a wave?

 wavelength period
A
 metres Hertz
B
 seconds Hertz
C
 metres seconds
D
 Hertz seconds

5. "The displacement of the medium is parallel to the motion of the wave".

This sentence is describing...

  • A. all travelling waves
  • B. all longitudinal waves
  • C. all electromagnetic waves
  • D. all transverse waves

6. The period of a wave is 0.5 s and the wave speed 100 ms-1. What is the frequency and wavelength of this wave?

  • A. f = 2 Hz, λ = 50 m
  • B. f = 5 Hz, λ = 50 m
  • C. f = 2 Hz, λ = 20 m
  • D. f = 5 Hz, λ = 20 m

7. The graph below shows the displacement of a point on a long spring as a wave passes along it.

wave motion graph for a pendulum

  

A student writes down 3 statements about the wave:

  • I. The wave must be a transverse wave.
  • II The period is 2 s.
  • III. The frequency of the wave is 0.5 Hz.
  

Which of the 3 statements is/are correct?

  • A. I only
  • B. I and II
  • C. III only
  • D. none of them

8. A plastic ball is floating on the sea as a wave goes past. At T=0, the ball is at the top of a wave. Which of the following waves best shows a displacement-time graph of the subsequent motion of the ball?

SHM graphs x 4 displacement ~ time

9&10. The diagram below shows two investigations with waves approaching two narrow barriers.

waves passing through 2 narrow gaps

  

9. Which of these sentences best describes what is being illustrated in these diagrams?

  • A. wavefronts being diffracted
  • B. rays being diffracted
  • C. wavefronts being refracted
  • D. rays being refracted

10. The second diagram shows a semi-circular pattern after the narrow gap. This pattern is seen if.....

  • A. the gap width is similar to the length of the wavefronts
  • B. the barrier thickness is similar to the length of the wavefronts
  • C. the gap width is similar to the wavelength
  • D. the barrier thickness is similar to the wavelength