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JEEMAIN and NEET
>>
Physics
>>
Class12
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Electromagnetic Waves
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Q)
If
c
is the speed of electromagnetic waves in vacuum, their speed in a medium of dielectric constant
K
and relative permeability
μ
r
is
(
a
)
v
=
μ
√
μ
r
K
(
b
)
v
=
c
√
μ
r
K
(
c
)
v
=
c
√
μ
r
K
(
d
)
v
=
K
√
μ
r
c
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