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Hertz produced electromagnetic wave by usingA. L C R circuitB. C R circuitC. L C circuitD. none of the above |
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Answer» Correct Answer - C Velocity of light waves in material is `v=nlamda` ..(i) Refractive index of material is `mu=(c)/(v)` ..(ii) Where `c` is speed of light in vacuum or air. or `mu=(c)/(nlamda)` ..(iii) Given, `n=2xx10^(14)Hz` `lamda=5000A=5000xx10^(-10)m` `c=3xx10^(8) m//s` Hence, from Eq. (iii) we get `mu=(3xx10^(8))/(2xx10^(14)xx5000xx10^(-10))=3.00` |
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