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A. The electric field of a plane electro...

A. The electric field of a plane electromagnetic wave travelling in the `+ve` Z - direction is described by
a. `Ex=E_(0)sin (kz+omega t)`
b. `Ex = E_(0)sin (kz - omega t)`
c. `Ex = E_(0)sin (2kz)`
d. `Ex=E_(0)sin (kz)`
B. We feel excessive sweating on a cloudy day. Why ?

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