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Electromagnetic Waves
Electromagnetic Waves
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A revision quiz for the Electromagnetic Spectrum (and waves in general)
Flashcards
30 cards
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Practice quiz
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Host live
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Questions
30
Answers
1
Which EM waves have the most energy?
Infrared
Gamma rays
Radio waves
Ultraviolet
2
Which of these is a longitudinal wave?
Sound wave
Radio wave
Light wave
Water wave
3
Which of these can be used to sterilise water?
Ultraviolet
Radio waves
Infrared
Visible light
4
What can gamma rays be used for in a hospital?
Killing cancer cells
All three
Sterilising surgical tools
Detecting cancer using tracers
5
Optical fibres are a method of sending signals that use:
Gamma rays
Radio waves
Microwaves
Visible light
6
Which EM wave has the highest frequency?
Radio waves
Gamma rays
Infrared
Ultraviolet
7
What safety precautions should be taken when using lasers?
Lead shielding
Magnetic shielding
Sun-screen
Safety goggles to protect the retinas
8
True or False - all electromagnetic waves travel at the speed of light
False
True
9
Which EM wave is given off by hot objects?
Gamma rays
X-rays
Infrared
Radio waves
10
Sally counts 8 water waves passing her in 4 seconds. What is the frequency of the waves?
16Hz
8Hz
2Hz
4Hz
11
Which of these is used to send TV broadcasts over great distances?
X-rays
Radio Waves
Microwaves
Visible light
12
Which of these can be used to cook food?
Microwaves
X-rays
Infrared
Radio waves
13
X-rays produce an image of your skeleton because they are absorbed by tissues with a high:
Water content
Number of cells
Blood count
Density
14
Which letter shows the amplitude of the wave?
D
A
C
B
15
What is the dotted line at 90 degrees to the surface called?
Boundary
Incident ray
Normal
Refracted ray
16
Which letter(s) show the wavelength of the wave?
B
D
C
A
17
What do all electromagnetic wave have in common?
They are all longitudinal waves
They are all transverse waves
They are all the same energy
They are all the same frequency
18
What does the 'r' stand for in this diagram?
Angle of reflection
Angle of incidence
Angle of refraction
Angle of invisibility
19
A beam of light bends away from the normal as it crosses into a medium that is:
Less dense
Denser
The same density
20
What is the unit for measuring frequency?
Joules
Metres
Seconds
Hertz
21
A beam of light crosses into a denser medium at an angle to the normal. Does it:
Bend away from the normal
Carry on at the same angle
Bend towards the normal
Go in the same direction as the normal
22
What is between visible light and x-rays on the EM spectrum?
Gamma rays
Infrared
Radio Waves
Ultraviolet
23
Some materials emit visible light when you shine ultraviolet light on them. This is called:
Fluorescence
Luminescence
Reflection
Refraction
24
What does the 'i' stand for in this diagram?
Angle of reflection
Angle of incidence
Angle of refraction
Angle of invisibility
25
Waves can transfer:
Matter
Information
Energy
26
Which of these is least harmful to humans?
Ultraviolet
X-rays
Gamma rays
Radio waves
27
What type of EM wave can be detected with our eyes?
Microwaves
X-rays
Ultraviolet
Visible light
28
When an EM wave passes into a denser material, it can change direction. This is called:
Polarisation
Reflection
Diffraction
Refraction
29
The electromagnetic spectrum is split up into waves with different:
Polarisations
Speeds
Frequencies
Amplitudes
30
Which EM waves have the longest wavelength?
Visible light
Radio waves
Microwaves
Gamma rays
