Class 12 NEET Physics Electromagnetic Waves Questions

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Question : 26 of 51
 
Marks: +1, -0
The electric field associated with an em wave in vacuum is given by
→
E
=
∧
i
40
c
o
s
(kz−6×108t)
,
where E,z and t are in volt/m, meter and seconds respectively. The value of wave vector k is
(2012)
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