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Assertion: EM wave are transwers in natu...

Assertion: EM wave are transwers in nature.
Reason: The electric and magnetic fields of an e.m. wave are perpendicular to each other also perpendicular to the direction of wave propagation.

A

Statement-1 is true, statement-2, is true, statement-2 is a correct explanation for statement -1

B

statement -1 is true, statement -2 is true, statement -2 is NOT a correct explanation for statement -1

C

statement-1 is true , statement-2 is false

D

statement-1 is false, statement-2 is true

Text Solution

Verified by Experts

The correct Answer is:
A
`lamda=(c//v)=1.5xx10^(-2)m`
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Assertion In electromagnetic wave, if direction of veriations of electric and magnetic field are perpendicular to each other and also perpendicular to the direction of wave propagation. Reason Electronegative waves are transverse in nature.

Knowledge Check

  • Assertion : Electromagnetic waves are transverse in nature Reason : The electric and magnetic fields in electromagnetic waves are perpendicular to each other and to the direction of propagation.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion
    C
    If assertion is true but reason is false
    D
    If both assertion and reason are false

  • Assertion In electromagnetic wave, if direction of veriations of electric and magnetic field are perpendicular to each other and also perpendicular to the direction of wave propagation. Reason Electronegative waves are transverse in nature.

    A
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
    B
    If both Assertion and Reason are true but Reason is not correct explanation of Assertion.
    C
    If Assertion is true but Reason is false.
    D
    If Assertion is false but Reason is true.

  • When a capacitor of capacitance C after charging with a charge Q is connected to inductor of self inductance L, the oscillation of charge takes place with time between the two plates of capacitor. If one plate of capacitor is connected to antenna and other plate is earthed, then em wave are produced, which are sinusoidal variation of electric and magnetic field vectors, perpendicular to each other as well as perpendicular to the direction of propagation of wave. The velocity of these waves depends upon the electric and magnetic properties of the medium. the em wave were produced experimentally by Hertz in 1888 using Hertz Oscillator, which were of wavelength 6m. Jagdish chander bose in 1895 produced these waves which were of wave length 5mm to 25mm and in 1896, G. Marconi established a wireless communication between two stations 50km apart using em waves. In an em wave, the amplitude of electric field is 10Vm^-1 . The frequency of wave is 5xx10^(14)Hz . the wave is propagating along z-axis. Sun also sends em wave to earth. which one of em wave out of the visible portion, from sun will be reaching the surface of earth earlier than others:

    A
    violet waves
    B
    green waves
    C
    yellow waves
    D
    red waves