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For plane electromagnetic waves propagat...

For plane electromagnetic waves propagating in the z-direction , which one of the following combinations gives the correct possible direction for `vecE and vecB` field respectively ?

A

`(2hati+3hatj and (hati+2hatj)`

B

`(-2hati-3hatj) and (3hati-2hatj)`

C

`(3hati+4hatj) and (4hati-3hatj)`

D

`(hati+2hatj) and (2hati-hatj)`

Text Solution

Verified by Experts

The correct Answer is:
B
As we know, `vecE.vecB=0" "because [vecE_|_vecB]`
and `vecExxvecB` should be along Z direction
As `(-2hati-3hatj)xx(3hati-2hatj)=5hatk`
Hence option (b) is the correct answer.
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DISHA PUBLICATION-ELECTROMAGNETIC WAVES-Exercise - 2 : Concept Applicator
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  3. The electric and the magnetic field, associated with an e.m. wave prop...

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  5. An em wave going through vacuum is described by E=E0sin(kx-omegat) B...

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  6. An electromagnetic wave of frequency v=3.0 MHz passes from vacuum into...

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  10. The magnetic component of a polarised wave of light is [B(x)=(4.0xx10^...

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  16. In a plane electromagnetic wave propagating in space has an electric f...

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