Waves - The EM Spectrum - smart phone physics

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  • Created by: Mal
  • Created on: 19-03-14 12:06
Preview of Waves - The EM Spectrum - smart phone physics

First 49 words of the document:

An electromagnetic
wave transfers Energy
between charged
Electromagnetic waves
can move through
physical media (e.g.
glass) but do not rely
on it, since even a
vacuum (space) has
magnetic and electric

Other pages in this set

Page 2

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The E.M.…read more

Page 3

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UVA (400-315nm)
UVB (315-280nm)
UVC (280-100nm)
A ­ causes tanning
B & C cause sunburn &
skin cancer
We need some UVB to
make vitamin D
Sunscreen contains
chemicals to filter out
UVA and UVB.
UVC is blocked by the
Glass also blocks all UV.…read more

Page 4

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...on the Ultraviolet part
of the E.M.…read more

Page 5

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Why E.M.?
What do we mean by
They have nothing to
do with electromagnets.
Electromagnetic waves
are made of oscillating
Electric and Magnetic
Fields.…read more

Page 6

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Fields ?
You live in a constant
gravitational field.
A Field is a region
where a particular type
of object experiences a
If you are in a constant
gravitational field and
you have MASS, you
can experience a
gravitational force (i.e.
weight).…read more

Page 7

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Fields ?
And if you have
CHARGE, you can
experience a force if
you are in a constant
electric field and/or
moving through a
constant magnetic field.…read more

Page 8

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E.M. Wave
An Electromagnetic
wave is where the
strengths (i.e
amplitudes) of an
Electric Field and a
Magnetic Field keep
changing.…read more

Page 9

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E.M. Wave
Electric Field
Magnetic Field
This transverse wave
moves along at c, the
speed of light
(3.…read more

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