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How many waves does the electromagnetic spectrum consist of?

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How many waves does the electromagnetic spectrum consist of? 8 1 7 9 All electromagnetic waves are: Sound waves? Low frequency waves? Transverse waves? – PowerPoint PPT presentation

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Title: How many waves does the electromagnetic spectrum consist of?


1

2
How many waves does the electromagnetic spectrum
consist of?
8
1
7
9
3
All electromagnetic waves are
Sound waves?
Low frequency waves?
Transverse waves?
Longitudinal waves?
4
What type of electromagnetic wave is emitted by
hot objects?
Infra red
X rays
Gamma
Visible light
5
What is the lowest frequency wave in the
electromagnetic spectrum?
Gamma
Visible light
Micro
Radio
6
Which electromagnetic wave is reflected by the
ionosphere?
Microwaves
Radio waves
Visible light
Ultra violet
7
Which type of EM wave is used for night vision?
Infra red
Visible light
Ultra violet
X rays
8
Which electromagnetic wave is the rattlesnake
able to detect which human cannot?
Visible light
Infra red
X rays
Micro waves
9
Which of the following is not a property of
electromagnetic waves
They can all travel through a vacuum
They are all transverse waves
They can all penetrate body tissue
They all transfer energy
10
Which is the most penetrating wave in the
electromagnetic spectrum?
Gamma
X rays
Visible light
Infra red
11
Which is a type of ionising radiation?
Micro waves
Visible light
Ultra violet rays
X rays
12
Which of the following is used for protection
from X rays?
Several cm of lead
Thick concrete
Sheet of lead several mm thick
Metal Grids
13
Which of the following statements is not true for
Gamma rays.
It can kill living cells
It is safe in low doses
It can penetrate lead several cm thick
It can be used to treat cancer
14
Which has the second longest wavelength in the
electromagnetic spectrum?
Microwaves
Gamma rays
Radio waves
X rays
15
What type of radiation is visible to bees?
Ultra violet
Infra red
Gamma
X rays
16
What were X rays initially called
Fracture Rays
X rays
High frequency rays
Unknown Rays
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