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IGCSE PHYSICS

WAVES TEST

Page 1

The following diagram shows the electromagnetic spectrum. However all the names and colours have been mixed up.

INFRA-RED
X -RAYS
ULTRA-VIOLET
              
GAMMA RAYS
RADIO WAVES
MICROWAVES

 

What region of the REAL electromagnetic spectrum

 

1. has the highest frequency?
2. has the longest wavelength?
3. has the most energy?
4. is used in remote controls for televisions?
5. can be used to kill cancer cells?
6. is used to make florescent inks ‘glow’?

 

Which colour of visible light in the real spectrum..

 
7.  Has the longest wavelength?
8, Comes between orange and green in the spectrum?

9. All electromagnetic waves have similar properties. Which one of these is NOT a property of electromagnetic waves?

  • A). All travel at the same speed
  • B), They all can pass through a vacuum
  • C). They can all be reflected
  • D). They all have a longer wavelength than sound waves.
10. Which one of these is a longitudinal wave?
  • A). Water (surface) waves
  • B), Sound wave
  • C). Radio wave
  • D). Mexican wave

11. Which of these is the correct term for a wave where the individual particles move at right angles to the direction of the wave energy transfer?

  • A). Transverse
  • B). Longitudinal
  • C). Refracted
  • D). Propagated

12. Which of these arrows correctly shows the amplitude and wavelength?

wave

  
 
Amplitude
Wavelength
A).
x
p
B).
y
p
C).
x
q
D).
y
q
13. Which of these is the correct formula to calculate wave velocity?
  • A). v= ƒ λ
  • B). v= T λ
  • C). v= 1/T
  • D). v= Tƒ

14. What letter is used to represent the period of a wave?

  • A).  ƒ
  • B).  λ
  • C).  T
  • D).  v

15. A water wave has a frequency of 0.5Hz.  What is the period of the wave?

  • A).  0.5s
  • B).  2s
  • C).  20s
  • D).  4s

 

The period of a sound wave is 0.0004 s.

  

16.  What is this period in milliseconds?

  • A). 4 ms
  • B). 40 ms
  • C).  0.4 ms
  • D).  4000 ms

 

 17. What would be the frequency of this wave in kHz?

  • A).  40
  • B).  0.25
  • C).  400
  • D). 2.5

What are the missing values in this table showing data for sound waves travelling through different substances?

  
 
wavelength
frequency
velocity
18.
20m
60Hz
19.
5m
300 m/s
20.
2kHz
1600 m/s
21.
0.5Hz
200 m/s
phones

22. Which of these gives the range of human hearing?

  • A). 2 – 2000 Hz
  • B). 20 – 2000 Hz
  • C).  2 – 20 000 Hz
  • D).  20 – 20 000 Hz

A sound wave is produced by a student banging two wooden blocks together. The student is 50m from a large wall. After 0.3s an echo is heard.

 
23. What causes the echo?
  • A).  Sound being refracted by the wall.
  • B).  Sound being reflected off the blocks.
  • C).  Sound being bounced off the air molecules.
  • D).  Sound being reflected by the wall.
24. What is the speed of the sound wave produced?
  • A). 167 m/s
  • B). 333 m/s
  • C). 15 m/s
  • D). 30 m/s
25. Which of these would NOT help make the result more reliable?
  • A).  Take additional results
  • B). Move closer to the wall
  • C).  Bang the blocks as hard as possible
  • D).  Use a datalogger and sound sensor to record the results