A linearly polarized electromagnetic wave in vacuum is E = 3.1 cos[(1.8)z - (5.4 × 10?)t] î N/C. Is incident normally on a perfectly reflecting wall at z = a. Choose the correct option
A linearly polarized electromagnetic wave in vacuum is E = 3.1 cos[(1.8)z - (5.4 × 10?)t] î N/C. Is incident normally on a perfectly reflecting wall at z = a. Choose the correct option
Option 1 -
The frequency of electromagnetic wave is 54 * 10⁷ Hz.
Option 2 -
The transmitted wave will be 3.1 cos[(1.8)z - (5.4 * 10⁸)t] î N/C
Option 3 -
The reflected wave will be 3.1 cos[(1.8)z + (5.4 * 10⁸)t] î N/C
Option 4 -
The wavelength is 5.4 m
Asked by Shiksha User
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1 Answer
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Correct Option - 2
Detailed Solution:Reflected wave will be 3.1cos [1.8z + (5.4×10? )t] î N/C
K = 2π/λ
⇒ 1.8 = 2π/λ
λ = 2π/1.8 = π/0.9 = 10π/9 = (10/9) × 3.14
= 3.48m
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