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An electromagnetic wave of frequency ups...

An electromagnetic wave of frequency `upsilon=3` MHz passes from vacuum into a dielectric medium with permittivity `epsilon=4`. Then

A

wavelength is doubled and the frequency remains unchainged

B

wavelength is doubled and frequency becomes half

C

wavelength is halved and frequency remains unchanged

D

wavelength and frequency both remain unchanged

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • An electromagnetic wave of frequency v=3.0 MHz passes from vacuum into a dielectric medium with permittivity epsilon=4.0 . Then

    A
    wavelength and frequency both become half.
    B
    wavelength is doubled and frequency remains unchanged.
    C
    wavelength and frequency both remain unchanged.
    D
    wavelength is halved and frequency remains unchanged.

  • A plane electromagnetic wave of frequency 25 Mhz travels in free space along the x-direction. At a particular point in space and time, E= (6.3 j) V//m . What is B at this point?

    A
    `1.2xx10^(-6)T`
    B
    `1.2xx10^(-8)T`
    C
    `2.1xx10^(-6)T`
    D
    `2.1xx10^(-8)T`

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    A plane electromagnetic wave of frequency 20 MHz travels through a space along x-direction. If the electric field vector at a certain point in space is 6 Vm^(-1) ,then what is the magnetic field vector at that point?

    A plane electromagnetic wave of frequency 40 MHz travels in free spae in the x-direction. At some point and at some instant, the electric field vecE has its maximum value of 750 N/C in y-direction. (i) What is the wavelenght of the wave ? (ii) What is the period of the wave? (iii) What is the amplitude of magnetic field?

    A plane electromagnetic wave of frequency 28 MHz travels in free space along the positive x-direction . At a particular point in space and time, electric field is 9.3 V/m along positive y-direction. The magnetic field (in T) at that point is

    A plane electromagnetic wave of frequency 25 GHz is propagating in vacuum along the z-direction. At a particular point in space and time, the magentic field is given by vecB = 5 xx 10^(-8) hati T . The corresponding electric field E is (speed of light c = 3 xx 10^(8)ms^(-1)

    A plane electromagnetic wave of frequency 25 Mhz travels in free space along the x-direction. At a particular point in space and time, E= (6.3 j) V//m . What is B at this point?

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