The electric field of a plane polarized electromagnetic wave in free space at time t=0 is given by an expression 
(x, y) = 10
cos [(6x+8z)] The magnetic field 
(x, z, t) is given by :(c is the velocity of light)
(a)
= (6
+8
)cos [(6x−8z+10ct)]
(b)
(6
−8
)cos[(6x+8z−10ct)]
(c)
(6
+8
)cos[(6x+8z−10ct)]
(d)
(6
−8
)cos[(6x+8z+10ct)]
The electric field of a plane polarized electromagnetic wave in free space at time t=0 is given by an expression (x, y) = 10 cos [(6x+8z)] The magnetic field (x, z, t) is given by :(c is the velocity of light)
(a)
= (6+8)cos [(6x−8z+10ct)]
(b)
(6−8)cos[(6x+8z−10ct)]
(c)
(6+8)cos[(6x+8z−10ct)]
(d)
(6−8)cos[(6x+8z+10ct)]
Question ID - 50259 | SaraNextGen Top Answer
The electric field of a plane polarized electromagnetic wave in free space at time t=0 is given by an expression (x, y) = 10 cos [(6x+8z)] The magnetic field (x, z, t) is given by :(c is the velocity of light)
(a)
= (6+8)cos [(6x−8z+10ct)]
(b)
(6−8)cos[(6x+8z−10ct)]
(c)
(6+8)cos[(6x+8z−10ct)]
(d)
(6−8)cos[(6x+8z+10ct)]
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The electric field of a plane polarized electromagnetic wave in free space at time t=0 is given by an expression |
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(a) |
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(b) |
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(c) |
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(d) |
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=10
cos [(6
+8
). (x
+z
)]
=10
cos [
]
∴
=6
+8
; direction of waves travel.
i.e. direction of ‘c’.
∴ Direction of 
will be along
×
=
Mag. of 
will be along 
×
=
Mag. of 
=
=
∴
=
=