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ziro4ka [17]
3 years ago
8

A perfectly conductive plate is placed in the y z-plane. An electromagnetic wave with electric field is incident on the conducto

r. If the wave strikes the plate at t = 0, what are the directions of the electric and magnetic fields of the reflected wave immediately after reflection?
Physics
1 answer:
Marizza181 [45]3 years ago
7 0

Answer:

Electric field will move in y-direction, while magnetic field will move in z-direction.

Explanation:

If we make a sketch of electromagnetic wave propagation, we will discover that, the direction of the electric field will be towards y-direction and the direction of the magnetic field will be towards z-direction.

Therefore, if electromagnetic wave with electric field is incident on the conductor, immediately after reflection, Electric field will move in y-direction, while magnetic field will move in z-direction.

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Part a)

I = 3.16 \times 10^{-5} W/m^2

Part b)

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Explanation:

Part a)

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here we know that

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75 = 10 Log(\frac{I}{10^{-12}})

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Part b)

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here we know that

A = \frac{P_o}{Bk}

so we have

I = \frac{1}{2}\rho(\frac{P_o}{Bk})^2\omega^2 c

I = \frac{1}{2}\rho P_o^2 \frac{c^3}{B^2}

now we know

\rho = 1.2 kg/m^3

c = 340 m/s

B = 1.4 \times 10^5 Pa

now we have

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