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QJEEM18Phdd4a: JEE Main 2018 Physics - Class 12 JEEM18Phdd4a Solution: A plane polarized monochromatic EM wave is traveling in vacuum…

A plane polarized monochromatic EM wave is traveling in vacuum along z direction such that at t = t1 it is found that the electric field is zero at a spatial point z1. The next zero that occurs in its neighbourhood is at z2. The frequency of the electroagnetic wave is :

Multiple Choice Options

  • A 3×108|z2−z1|
  • B 1.5×108|z2−z1|
  • C 6×108|z2−z1|
  • D 1t1+|z2−z1|3×108

Step-by-Step Verified Solution

Since c=fλ⇒f=cλ. Here, λ=2|z2−z1| and c=3×108. Therefore,

f=3×1082|z2−z1|=1.5×108|z2−z1|

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