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An electromagnetic wave travels from vacuum into a… | StemPy Lab
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An electromagnetic wave travels from vacuum into a non-magnetic medium whose relative permittivity is 4. Its speed in the medium and the change in its wavelength are
Physics
Medium
High School (11–12)
Electricity & Magnetism
Created by
StemPy Lab
An electromagnetic wave travels from vacuum into a non-magnetic medium whose relative permittivity is
4
4
4
. Its speed in the medium and the change in its wavelength are
6
×
10
8
m/s
6\times10^8\ \text{m/s}
6
×
1
0
8
m/s
, and the wavelength doubles
1.5
×
10
8
m/s
1.5\times10^8\ \text{m/s}
1.5
×
1
0
8
m/s
, and the wavelength stays the same
0.75
×
10
8
m/s
0.75\times10^8\ \text{m/s}
0.75
×
1
0
8
m/s
, and the wavelength becomes a quarter
1.5
×
10
8
m/s
1.5\times10^8\ \text{m/s}
1.5
×
1
0
8
m/s
, and the wavelength halves
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