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  • (a) Write the expression for the speed of light in a material medium of relative permittivity  and relative magnetic permeability <img alt="\mu

(a) Write the expression for the speed of light in a material medium of relative permittivity \varepsilon _{r} and relative magnetic permeability \mu _{r}

(b) Write the wavelength range and name of the electromagnetic waves which are used in (i) radar systems for aircraft navigation,
and (ii) Earth satellites to observe the growth of the crops.

 

 
 
 
 
 

Answers (1)

a)

Speed of light

v=\frac{1}{\sqrt{\mu_0\mu_r\epsilon_0\epsilon_r}}

b)

i) Microwave 1mm to 0.1m

ii) Infrared wave 1mm to 700nm

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Safeer PP

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