A linearly polarized electromagnetic wave given as E = E0 𝑖̂ cos (kz – ωt) is incident normally on a perfectly reflecting infinite wall at z = a. Assuming that the material of the wall is optically inactive, the reflected wave will be given as [NCERT Exemplar]
A. Er = -E0 𝑖̂ cos (kz – ωt).
B. Er = E0 𝑖̂ cos (kz + ωt).
C. Er = -E0 𝑖̂ cos (kz + ωt).
D. Er = E0 𝑖̂ sin (kz – ωt).
Answer:A
A linearly polarized electromagnetic wave given as E = E0 𝑖̂ cos (kz – ωt) is incident normally on a perfectly reflecting infinite wall at z = a. Assuming that the material of the wall is optically inactive, the reflected wave will be given as [NCERT Exemplar]
A. Er = -E0 𝑖̂ cos (kz – ωt). B. Er = E0 𝑖̂ cos (kz + ωt). C. Er = -E0 𝑖̂ cos (kz + ωt). D. Er = E0 𝑖̂ sin (kz – ωt).