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A linearly polarised electromagnetic wave in vacuum is E = 3 . 1 cos 1 . 8 z - 5 . 4 × 10 6 t i ^ N C - 1 is incident normally on a perfectly reflecting wall at z = a . Choose the correct option.

Options

  1. AThe wavelength is 5 . 4   m .
  2. BThe frequency of electromagnetic wave is 54 × 10 4   Hz .
  3. CThe transmitted wave will be 3 . 1 cos 1 . 8 z - 5 . 4 × 10 6 t i ^   N / C .
  4. DThe reflected wave will be 3 . 1 cos 1 . 8 z + 5 . 4 × 10 6 t i ^   N   C - 1 .

Correct answer

D. The reflected wave will be 3 . 1 cos 1 . 8 z + 5 . 4 × 10 6 t i ^   N   C - 1 .

Step-by-step solution

Reflected wave will have direction opposite to incident wave.

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