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An EM wave travelling through a medium h...

An EM wave travelling through a medium has electric field vector. `E_y = 4 times 10^5 cos (3.14 × 10^8 t – 1.57 x) N//C`. Here x is in m and t in s. Then find :
Direction of propagation

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An EM wave travelling through a medium has electric field vector. E_y = 4 times 10^5 cos (3.14 × 10^8 t – 1.57 x) N//C . Here x is in m and t in s. Then find : Frequency

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Suppose that the electric field of an electromagnetic wave in vacuum is E={(3.0 N //C) cos [1.8 rad//m) y +(5.4 xx 10^6 rad // s)t]}hat i (a) What is the direction of propagation of wave? (b) What is the wavelength lambda ? (c) What is the frequency f ? (d) What is the amplitude of the magnetic field of the wave (e) write an expression for the magnetic field of the wave.

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CBSE COMPLEMENTARY MATERIAL-ELECTROMAGNETIC WAVES AND OPTICS-NUMERICALS
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