Question 196: EM waves

Question

When light propagates through a material medium of relative permittivity $$\varepsilon $$r and relative permeability $$\mu$$r, the velocity of light, v is given by (c-velocity of light in vacuum)

Accepted Answer

$$v = {1 \over {\sqrt {{\varepsilon _m}{\mu _m}} }}$$
$$v = {1 \over {\sqrt {{\varepsilon _0}{\varepsilon _r}{\mu _0}{\mu _r}} }}$$
Since $$c = {1 \over {\sqrt {{\varepsilon _0}{\mu _0}} }}$$
$$ \Rightarrow v = {c \over {\sqrt {{\varepsilon _r}{\mu _r}} }}$$

Answer

v = c

Answer

$$v = \sqrt {{{{\mu _r}} \over {{\varepsilon _r}}}} $$

Answer

$$v = \sqrt {{{{\varepsilon _r}} \over {{\mu _r}}}} $$

Answer

$$v = {c \over {\sqrt {{\varepsilon _r}{\mu _r}} }}$$

EM waves

When light propagates through a material medium of relative permittivity $\varepsilon r and relative permeability \mu$r, the velocity of light, v is given by (c-velocity of light in vacuum)

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