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An electromagnetic wave of frequency 3 MHz passes from vaccum in to dielectric medium of constant

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An electromagnetic wave of frequency 3 MHz passes from vaccum in to dielectric medium of constant K = 4 and permeability μ0 .The wavelength of this wave in the dielectric is

(1) 200 m

(2) 100 m

(3) 25 m

(4) 25 m

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(3) 25 m

Speed of EM wave in the medium will be v = c/n

where n is the refractive index of the medium.

∴ Speed of EM waves in the dielectric is

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