1. Tardigrade
  2. Question
  3. Physics
  4. Given below are two statements: Statement I: A time varying electric field is a source of changing magnetic field and vice-versa. Thus a disturbance in electric or magnetic field creates EM waves. Statement II: In a material medium. The EM wave travels with speed v =(1/√μ0 ε0). In the light of the above statements, choose the correct answer from the options given below:

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Q. Given below are two statements:
Statement I : A time varying electric field is a source of changing magnetic field and vice-versa. Thus a disturbance in electric or magnetic field creates EM waves.
Statement II : In a material medium. The EM wave travels with speed $v =\frac{1}{\sqrt{\mu_{0} \varepsilon_{0}}}$.
In the light of the above statements, choose the correct answer from the options given below:

JEE MainJEE Main 2022Electromagnetic Waves

Solution:

The statement II is wrong as the velocity of $\varepsilon m$ wave in a medium is $\frac{1}{\sqrt{\mu \varepsilon}}=\frac{1}{\sqrt{\mu_{0} \mu_{ r } \varepsilon_{0} \varepsilon_{ r }}}$.