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Write expression for speed of em waves i...

Write expression for speed of em waves in a medium of electrical permittivity `in` and magnetic permeability `mu`

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To derive the expression for the speed of electromagnetic (EM) waves in a medium characterized by its electric permittivity (ε) and magnetic permeability (μ), we follow these steps: ### Step-by-Step Solution: 1. **Understand the relationship between speed, permittivity, and permeability**: The speed of electromagnetic waves in a medium can be expressed as: \[ v = \frac{1}{\sqrt{\mu \epsilon}} ...
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(i) mu=(c)/(v_m)=(vlambda)/(vlambda_m) where c: speed of light in vacuum v_m: speed of light in medium lambda: wavelength in vacuum lambda_m : wavelength in medium upsilon: frequency of light (ii) mu=((epsilonmu)/(epsilon_0mu_0))^(1/2) where epsilon: electric permittivity in free space epsilon: electric permittivity in medium mu_0: magnetic permeability in free space mu: magnetic permeability in medium (iii) mu=A+B/lambda^2 , where A and B are constants (iv) In case of VIBGYOR, wavelength increases from violet to red, refractive index decreases from violet to red. Wavelength for red-colour is maximum whereas refractive index is maximum for violet colour.