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Hertz produced electromagnetic wave by u...

Hertz produced electromagnetic wave by using

A

L C R circuit

B

C R circuit

C

L C circuit

D

none of the above

Text Solution

Verified by Experts

The correct Answer is:
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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